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title="アカウントを作成してログインすることをお勧めしますが、必須ではありません"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>アカウント作成</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=%E7%89%B9%E5%88%A5:%E3%83%AD%E3%82%B0%E3%82%A4%E3%83%B3&returnto=161" title="ログインすることを推奨します。ただし、必須ではありません。 [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>ログイン</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> ログアウトした編集者のページ <a href="/wiki/Wikipedia:%E3%82%A6%E3%82%A3%E3%82%AD%E3%83%9A%E3%83%87%E3%82%A3%E3%82%A2%E3%81%B8%E3%82%88%E3%81%86%E3%81%93%E3%81%9D" aria-label="編集の詳細"><span>もっと詳しく</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/%E7%89%B9%E5%88%A5:%E8%87%AA%E5%88%86%E3%81%AE%E6%8A%95%E7%A8%BF%E8%A8%98%E9%8C%B2" title="このIPアドレスからなされた編集の一覧 [y]" accesskey="y"><span>投稿記録</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/%E7%89%B9%E5%88%A5:%E3%83%88%E3%83%BC%E3%82%AF%E3%83%9A%E3%83%BC%E3%82%B8" title="このIPアドレスからなされた編集についての議論 [n]" accesskey="n"><span>トーク</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="サイト"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="目次" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">目次</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">サイドバーに移動</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">非表示</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">ページ先頭</div> </a> </li> <li id="toc-性質" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#性質"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>性質</span> </div> </a> <ul id="toc-性質-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-その他161に関連すること" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#その他161に関連すること"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>その他161に関連すること</span> </div> </a> <ul id="toc-その他161に関連すること-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-脚注" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#脚注"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>脚注</span> </div> </a> <ul id="toc-脚注-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-関連項目" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#関連項目"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>関連項目</span> </div> </a> <ul id="toc-関連項目-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="目次" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="目次" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="目次の表示・非表示を切り替え" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">目次の表示・非表示を切り替え</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">161</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="特定の記事の別の言語版に移動します。利用可能な言語45件" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-45" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">45の言語版</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/161_(%D8%B9%D8%AF%D8%AF)" title="アラビア語: 161 (عدد)" lang="ar" hreflang="ar" data-title="161 (عدد)" data-language-autonym="العربية" data-language-local-name="アラビア語" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/161_(%C9%99d%C9%99d)" title="アゼルバイジャン語: 161 (ədəd)" lang="az" hreflang="az" data-title="161 (ədəd)" data-language-autonym="Azərbaycanca" data-language-local-name="アゼルバイジャン語" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%DB%B1%DB%B6%DB%B1_(%D8%B3%D8%A7%DB%8C%DB%8C)" title="South Azerbaijani: ۱۶۱ (سایی)" lang="azb" hreflang="azb" data-title="۱۶۱ (سایی)" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/161_(%D1%87%D0%B8%D1%81%D0%BB%D0%BE)" title="ブルガリア語: 161 (число)" lang="bg" hreflang="bg" data-title="161 (число)" data-language-autonym="Български" data-language-local-name="ブルガリア語" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Nombre_161" title="カタロニア語: Nombre 161" lang="ca" hreflang="ca" data-title="Nombre 161" data-language-autonym="Català" data-language-local-name="カタロニア語" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/161" title="閩東語: 161" lang="cdo" hreflang="cdo" data-title="161" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="閩東語" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%A1%D9%A6%D9%A1_(%DA%98%D9%85%D8%A7%D8%B1%DB%95)" title="中央クルド語: ١٦١ (ژمارە)" lang="ckb" hreflang="ckb" data-title="١٦١ (ژمارە)" data-language-autonym="کوردی" data-language-local-name="中央クルド語" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/161_(%C4%8D%C3%ADslo)" title="チェコ語: 161 (číslo)" lang="cs" hreflang="cs" data-title="161 (číslo)" data-language-autonym="Čeština" data-language-local-name="チェコ語" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/161_(%D1%85%D0%B8%D1%81%D0%B5%D0%BF)" title="チュヴァシ語: 161 (хисеп)" lang="cv" hreflang="cv" data-title="161 (хисеп)" data-language-autonym="Чӑвашла" data-language-local-name="チュヴァシ語" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/161_(n%C3%B9mer)" title="エミリア・ロマーニャ語: 161 (nùmer)" lang="egl" hreflang="egl" data-title="161 (nùmer)" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="エミリア・ロマーニャ語" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/161_(number)" title="英語: 161 (number)" lang="en" hreflang="en" data-title="161 (number)" data-language-autonym="English" data-language-local-name="英語" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Ehun_eta_hirurogeita_bat" title="バスク語: Ehun eta hirurogeita bat" lang="eu" hreflang="eu" data-title="Ehun eta hirurogeita bat" data-language-autonym="Euskara" data-language-local-name="バスク語" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DB%B1%DB%B6%DB%B1_(%D8%B9%D8%AF%D8%AF)" title="ペルシア語: ۱۶۱ (عدد)" lang="fa" hreflang="fa" data-title="۱۶۱ (عدد)" data-language-autonym="فارسی" data-language-local-name="ペルシア語" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/161_(nombre)" title="フランス語: 161 (nombre)" lang="fr" hreflang="fr" data-title="161 (nombre)" data-language-autonym="Français" data-language-local-name="フランス語" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/161_(uimhir)" title="アイルランド語: 161 (uimhir)" lang="ga" hreflang="ga" data-title="161 (uimhir)" data-language-autonym="Gaeilge" data-language-local-name="アイルランド語" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/161_(nonm)" title="ハイチ・クレオール語: 161 (nonm)" lang="ht" hreflang="ht" data-title="161 (nonm)" data-language-autonym="Kreyòl ayisyen" data-language-local-name="ハイチ・クレオール語" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/161_(sz%C3%A1m)" title="ハンガリー語: 161 (szám)" lang="hu" hreflang="hu" data-title="161 (szám)" data-language-autonym="Magyar" data-language-local-name="ハンガリー語" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/161_(%D5%A9%D5%AB%D5%BE)" title="アルメニア語: 161 (թիվ)" lang="hy" hreflang="hy" data-title="161 (թիվ)" data-language-autonym="Հայերեն" data-language-local-name="アルメニア語" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hyw mw-list-item"><a href="https://hyw.wikipedia.org/wiki/161_(%D5%A9%D5%AB%D6%82)" title="Western Armenian: 161 (թիւ)" lang="hyw" hreflang="hyw" data-title="161 (թիւ)" data-language-autonym="Արեւմտահայերէն" data-language-local-name="Western Armenian" class="interlanguage-link-target"><span>Արեւմտահայերէն</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/161_(numero)" title="イタリア語: 161 (numero)" lang="it" hreflang="it" data-title="161 (numero)" data-language-autonym="Italiano" data-language-local-name="イタリア語" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/161" title="韓国語: 161" lang="ko" hreflang="ko" data-title="161" data-language-autonym="한국어" data-language-local-name="韓国語" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/161_(%D0%B1%D1%80%D0%BE%D1%98)" title="マケドニア語: 161 (број)" lang="mk" hreflang="mk" data-title="161 (број)" data-language-autonym="Македонски" data-language-local-name="マケドニア語" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mni mw-list-item"><a href="https://mni.wikipedia.org/wiki/%EA%AF%B1%EA%AF%B6%EA%AF%B1" title="マニプリ語: ꯱꯶꯱" lang="mni" hreflang="mni" data-title="꯱꯶꯱" data-language-autonym="ꯃꯤꯇꯩ ꯂꯣꯟ" data-language-local-name="マニプリ語" class="interlanguage-link-target"><span>ꯃꯤꯇꯩ ꯂꯣꯟ</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/161_(nombor)" title="マレー語: 161 (nombor)" lang="ms" hreflang="ms" data-title="161 (nombor)" data-language-autonym="Bahasa Melayu" data-language-local-name="マレー語" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mzn mw-list-item"><a href="https://mzn.wikipedia.org/wiki/%DB%B1%DB%B6%DB%B1_(%D8%B9%D8%AF%D8%AF)" title="マーザンダラーン語: ۱۶۱ (عدد)" lang="mzn" hreflang="mzn" data-title="۱۶۱ (عدد)" data-language-autonym="مازِرونی" data-language-local-name="マーザンダラーン語" class="interlanguage-link-target"><span>مازِرونی</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/161_(getal)" title="オランダ語: 161 (getal)" lang="nl" hreflang="nl" data-title="161 (getal)" data-language-autonym="Nederlands" data-language-local-name="オランダ語" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/161_(tall)" title="ノルウェー語(ブークモール): 161 (tall)" lang="nb" hreflang="nb" data-title="161 (tall)" data-language-autonym="Norsk bokmål" data-language-local-name="ノルウェー語(ブークモール)" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nso mw-list-item"><a href="https://nso.wikipedia.org/wiki/161_(nomoro)" title="北部ソト語: 161 (nomoro)" lang="nso" hreflang="nso" data-title="161 (nomoro)" data-language-autonym="Sesotho sa Leboa" data-language-local-name="北部ソト語" class="interlanguage-link-target"><span>Sesotho sa Leboa</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/161_(liczba)" title="ポーランド語: 161 (liczba)" lang="pl" hreflang="pl" data-title="161 (liczba)" data-language-autonym="Polski" data-language-local-name="ポーランド語" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%DB%B1%DB%B6%DB%B1_(%D8%B9%D8%AF%D8%AF)" title="パシュトゥー語: ۱۶۱ (عدد)" lang="ps" hreflang="ps" data-title="۱۶۱ (عدد)" data-language-autonym="پښتو" data-language-local-name="パシュトゥー語" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt badge-Q70893996 mw-list-item" title=""><a href="https://pt.wikipedia.org/wiki/Cento_e_sessenta_e_um" title="ポルトガル語: Cento e sessenta e um" lang="pt" hreflang="pt" data-title="Cento e sessenta e um" data-language-autonym="Português" data-language-local-name="ポルトガル語" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/161_(num%C4%83r)" title="ルーマニア語: 161 (număr)" lang="ro" hreflang="ro" data-title="161 (număr)" data-language-autonym="Română" data-language-local-name="ルーマニア語" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/161_(number)" title="シンプル英語: 161 (number)" lang="en-simple" hreflang="en-simple" data-title="161 (number)" data-language-autonym="Simple English" data-language-local-name="シンプル英語" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/161_(%C5%A1tevilo)" title="スロベニア語: 161 (število)" lang="sl" hreflang="sl" data-title="161 (število)" data-language-autonym="Slovenščina" data-language-local-name="スロベニア語" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/161_(tal)" title="スウェーデン語: 161 (tal)" lang="sv" hreflang="sv" data-title="161 (tal)" data-language-autonym="Svenska" data-language-local-name="スウェーデン語" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Mia_moja_sitini_na_moja" title="スワヒリ語: Mia moja sitini na moja" lang="sw" hreflang="sw" data-title="Mia moja sitini na moja" data-language-autonym="Kiswahili" data-language-local-name="スワヒリ語" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/161_(%D1%81%D0%B0%D0%BD)" title="タタール語: 161 (сан)" lang="tt" hreflang="tt" data-title="161 (сан)" data-language-autonym="Татарча / tatarça" data-language-local-name="タタール語" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/161_(%D1%87%D0%B8%D1%81%D0%BB%D0%BE)" title="ウクライナ語: 161 (число)" lang="uk" hreflang="uk" data-title="161 (число)" data-language-autonym="Українська" data-language-local-name="ウクライナ語" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/161_(%D8%B9%D8%AF%D8%AF)" title="ウルドゥー語: 161 (عدد)" lang="ur" hreflang="ur" data-title="161 (عدد)" data-language-autonym="اردو" data-language-local-name="ウルドゥー語" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/161_(son)" title="ウズベク語: 161 (son)" lang="uz" hreflang="uz" data-title="161 (son)" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="ウズベク語" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/161_(s%E1%BB%91)" title="ベトナム語: 161 (số)" lang="vi" hreflang="vi" data-title="161 (số)" data-language-autonym="Tiếng Việt" data-language-local-name="ベトナム語" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-za mw-list-item"><a href="https://za.wikipedia.org/wiki/Bak_loeg_cib_it" title="チワン語: Bak loeg cib it" lang="za" hreflang="za" data-title="Bak loeg cib it" data-language-autonym="Vahcuengh" data-language-local-name="チワン語" class="interlanguage-link-target"><span>Vahcuengh</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/161" title="中国語: 161" lang="zh" hreflang="zh" data-title="161" data-language-autonym="中文" data-language-local-name="中国語" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/161" title="閩南語: 161" lang="nan" hreflang="nan" data-title="161" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="閩南語" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/161" title="広東語: 161" lang="yue" hreflang="yue" data-title="161" data-language-autonym="粵語" data-language-local-name="広東語" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q721084#sitelinks-wikipedia" title="言語間リンクを編集" class="wbc-editpage">リンクを編集</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="名前空間"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/161" title="本文を閲覧 [c]" accesskey="c"><span>ページ</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/%E3%83%8E%E3%83%BC%E3%83%88:161" rel="discussion" title="本文ページについての議論 [t]" accesskey="t"><span>ノート</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="別の言語に切り替える" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">日本語</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="表示"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/161"><span>閲覧</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=161&action=edit" title="このページのソースコードを編集する [e]" accesskey="e"><span>編集</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=161&action=history" title="このページの過去の版 [h]" accesskey="h"><span>履歴を表示</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="ページツール"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="ツール" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">ツール</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">ツール</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">サイドバーに移動</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">非表示</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="その他の操作" > <div class="vector-menu-heading"> 操作 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/161"><span>閲覧</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=161&action=edit" title="このページのソースコードを編集する [e]" accesskey="e"><span>編集</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=161&action=history"><span>履歴を表示</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> 全般 </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/%E7%89%B9%E5%88%A5:%E3%83%AA%E3%83%B3%E3%82%AF%E5%85%83/161" title="ここにリンクしている全ウィキページの一覧 [j]" accesskey="j"><span>リンク元</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/%E7%89%B9%E5%88%A5:%E9%96%A2%E9%80%A3%E3%83%9A%E3%83%BC%E3%82%B8%E3%81%AE%E6%9B%B4%E6%96%B0%E7%8A%B6%E6%B3%81/161" rel="nofollow" title="このページからリンクしているページの最近の更新 [k]" accesskey="k"><span>関連ページの更新状況</span></a></li><li id="t-upload" class="mw-list-item"><a href="//ja.wikipedia.org/wiki/Wikipedia:ファイルのアップロード" title="ファイルをアップロードする [u]" accesskey="u"><span>ファイルをアップロード</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=161&oldid=88070580" title="このページのこの版への固定リンク"><span>この版への固定リンク</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=161&action=info" title="このページについての詳細情報"><span>ページ情報</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=%E7%89%B9%E5%88%A5:%E3%81%93%E3%81%AE%E3%83%9A%E3%83%BC%E3%82%B8%E3%82%92%E5%BC%95%E7%94%A8&page=161&id=88070580&wpFormIdentifier=titleform" title="このページの引用方法"><span>このページを引用</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=%E7%89%B9%E5%88%A5:UrlShortener&url=https%3A%2F%2Fja.wikipedia.org%2Fwiki%2F161"><span>短縮URLを取得する</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=%E7%89%B9%E5%88%A5:QrCode&url=https%3A%2F%2Fja.wikipedia.org%2Fwiki%2F161"><span>QRコードをダウンロード</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> 印刷/書き出し </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=%E7%89%B9%E5%88%A5:%E3%83%96%E3%83%83%E3%82%AF&bookcmd=book_creator&referer=161"><span>ブックの新規作成</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=%E7%89%B9%E5%88%A5:DownloadAsPdf&page=161&action=show-download-screen"><span>PDF 形式でダウンロード</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=161&printable=yes" title="このページの印刷用ページ [p]" accesskey="p"><span>印刷用バージョン</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> 他のプロジェクト </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:161_(number)" hreflang="en"><span>コモンズ</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q721084" title="関連付けられたデータリポジトリ項目へのリンク [g]" accesskey="g"><span>ウィキデータ項目</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="ページツール"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="表示"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">表示</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">サイドバーに移動</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">非表示</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">出典: フリー百科事典『ウィキペディア（Wikipedia）』</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ja" dir="ltr"><table class="infobox bordered" style="width:22em; width:auto"><tbody><tr><th colspan="2" class="" style="text-align:center; font-size:125%; font-weight:bold; white-space:nowrap" itemprop=""><span style="font-size:75%"><a href="/wiki/160" title="160">160</a> <span class="Unicode">←</span></span> 161 <span style="font-size:75%"><span class="Unicode">→</span> <a href="/wiki/162" title="162">162</a></span></th></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E7%B4%A0%E5%9B%A0%E6%95%B0%E5%88%86%E8%A7%A3" title="素因数分解">素因数分解</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 7×23</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E4%BA%8C%E9%80%B2%E6%B3%95" title="二進法">二進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 10100001</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E4%B8%89%E9%80%B2%E6%B3%95" title="三進法">三進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 12222</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E5%9B%9B%E9%80%B2%E6%B3%95" title="四進法">四進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 2201</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E4%BA%94%E9%80%B2%E6%B3%95" title="五進法">五進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 1121</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E5%85%AD%E9%80%B2%E6%B3%95" title="六進法">六進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 425</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E4%B8%83%E9%80%B2%E6%B3%95" title="七進法">七進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 320</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E5%85%AB%E9%80%B2%E6%B3%95" title="八進法">八進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 241</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E5%8D%81%E4%BA%8C%E9%80%B2%E6%B3%95" title="十二進法">十二進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 115</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E5%8D%81%E5%85%AD%E9%80%B2%E6%B3%95" title="十六進法">十六進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> A1</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E4%BA%8C%E5%8D%81%E9%80%B2%E6%B3%95" title="二十進法">二十進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 81</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E4%BA%8C%E5%8D%81%E5%9B%9B%E9%80%B2%E6%B3%95" title="二十四進法">二十四進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 6H</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E4%B8%89%E5%8D%81%E5%85%AD%E9%80%B2%E6%B3%95" title="三十六進法">三十六進法</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 4H</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E3%83%AD%E3%83%BC%E3%83%9E%E6%95%B0%E5%AD%97" title="ローマ数字">ローマ数字</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> CLXI</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E6%BC%A2%E6%95%B0%E5%AD%97" title="漢数字">漢数字</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 百六十一</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E5%A4%A7%E5%AD%97_(%E6%95%B0%E5%AD%97)" title="大字 (数字)">大字</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> 百六拾壱</td></tr><tr class="" style="" itemprop=""><th scope="row" style="text-align:left; white-space:nowrap; white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em; background:#F2F2F2"><a href="/wiki/%E7%AE%97%E6%9C%A8" title="算木">算木</a></th><td class="" style="white-space:nowrap; vertical-align:middle; padding-left:0.5em; padding-right:0.5em" itemprop=""> <span class="mw-default-size skin-invert-image" typeof="mw:File/Frameless"><a href="/wiki/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Counting_rod_v1.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/1/19/Counting_rod_v1.png" decoding="async" width="7" height="29" class="mw-file-element" data-file-width="7" data-file-height="29" /></a></span><span class="mw-default-size skin-invert-image" typeof="mw:File/Frameless"><a href="/wiki/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Counting_rod_h6.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/c/c1/Counting_rod_h6.png" decoding="async" width="29" height="31" class="mw-file-element" data-file-width="29" data-file-height="31" /></a></span><span class="mw-default-size skin-invert-image" typeof="mw:File/Frameless"><a href="/wiki/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Counting_rod_v1.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/1/19/Counting_rod_v1.png" decoding="async" width="7" height="29" class="mw-file-element" data-file-width="7" data-file-height="29" /></a></span></td></tr></tbody></table> <p><b>161</b>（<b>百六十一</b>、ひゃくろくじゅういち）は<a href="/wiki/%E8%87%AA%E7%84%B6%E6%95%B0" title="自然数">自然数</a>、また<a href="/wiki/%E6%95%B4%E6%95%B0" title="整数">整数</a>において、<a href="/wiki/160" title="160">160</a>の次で<a href="/wiki/162" title="162">162</a>の前の数である。 </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="性質"><span id=".E6.80.A7.E8.B3.AA"></span>性質</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=161&action=edit&section=1" title="節を編集: 性質"><span>編集</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>161は<a href="/wiki/%E5%90%88%E6%88%90%E6%95%B0" title="合成数">合成数</a>であり、<a href="/wiki/%E7%B4%84%E6%95%B0" title="約数">約数</a>は <a href="/wiki/1" title="1">1</a>, <a href="/wiki/7" title="7">7</a>, <a href="/wiki/23" title="23">23</a> と 161 である。 <ul><li><a href="/wiki/%E7%B4%84%E6%95%B0%E3%81%AE%E5%92%8C" class="mw-redirect" title="約数の和">約数の和</a>は<a href="/wiki/192" title="192">192</a>。</li></ul></li> <li>54番目の<a href="/wiki/%E5%8D%8A%E7%B4%A0%E6%95%B0" title="半素数">半素数</a>である。1つ前は<a href="/wiki/159" title="159">159</a>、次は<a href="/wiki/166" title="166">166</a>。</li> <li>26番目の<a href="/wiki/%E5%9B%9E%E6%96%87%E6%95%B0" title="回文数">回文数</a>である。1つ前は<a href="/wiki/151" title="151">151</a>、次は<a href="/wiki/171" title="171">171</a>。</li> <li><a href="/wiki/%E5%90%84%E4%BD%8D%E3%81%AE%E5%92%8C" class="mw-redirect" title="各位の和">各位の和</a>が8になる16番目の数である。1つ前は<a href="/wiki/152" title="152">152</a>、次は<a href="/wiki/170" title="170">170</a>。</li> <li>各位の積が6になる9番目の数である。1つ前は<a href="/wiki/132" title="132">132</a>、次は<a href="/wiki/213" title="213">213</a>。(<a href="/wiki/%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E6%95%B4%E6%95%B0%E5%88%97%E5%A4%A7%E8%BE%9E%E5%85%B8" title="オンライン整数列大辞典">オンライン整数列大辞典</a>の数列 <a rel="nofollow" class="external text" href="//oeis.org/A199988">A199988</a>)</li> <li>161 = 5 × 2<sup>5</sup> + 1 <ul><li>5番目の<a href="/wiki/%E3%82%AB%E3%83%AC%E3%83%B3%E6%95%B0" title="カレン数">カレン数</a>である。1つ前は<a href="/wiki/65" title="65">65</a>、次は<a href="/wiki/385" title="385">385</a>。</li> <li>17番目の<a href="/wiki/%E3%83%97%E3%83%AD%E3%82%B9%E6%95%B0" title="プロス数">プロス数</a>である。1つ前は<a href="/wiki/145" title="145">145</a>、次は<a href="/wiki/177" title="177">177</a>。</li></ul></li> <li>161 = 1<sup>2</sup> + 4<sup>2</sup> + 12<sup>2</sup> = 2<sup>2</sup> + 6<sup>2</sup> + 11<sup>2</sup> = 4<sup>2</sup> + 8<sup>2</sup> + 9<sup>2</sup> = 5<sup>2</sup> + 6<sup>2</sup> + 10<sup>2</sup> <ul><li>3つの<a href="/wiki/%E5%B9%B3%E6%96%B9%E6%95%B0" title="平方数">平方数</a>の和4通りで表せる5番目の数である。1つ前は<a href="/wiki/153" title="153">153</a>、次は<a href="/wiki/171" title="171">171</a>。(<a href="/wiki/%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E6%95%B4%E6%95%B0%E5%88%97%E5%A4%A7%E8%BE%9E%E5%85%B8" title="オンライン整数列大辞典">オンライン整数列大辞典</a>の数列 <a rel="nofollow" class="external text" href="//oeis.org/A025324">A025324</a>)</li> <li>異なる3つの<a href="/wiki/%E5%B9%B3%E6%96%B9%E6%95%B0" title="平方数">平方数</a>の和4通りで表せる最小の数である。次は<a href="/wiki/189" title="189">189</a>。(<a href="/wiki/%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E6%95%B4%E6%95%B0%E5%88%97%E5%A4%A7%E8%BE%9E%E5%85%B8" title="オンライン整数列大辞典">オンライン整数列大辞典</a>の数列 <a rel="nofollow" class="external text" href="//oeis.org/A025342">A025342</a>)</li> <li>異なる3つの<a href="/wiki/%E5%B9%B3%E6%96%B9%E6%95%B0" title="平方数">平方数</a>の和 <i>n</i> 通りで表せる最小の数である。1つ前の3通りは<a href="/wiki/101" title="101">101</a>、次の5通りは<a href="/wiki/206" title="206">206</a>。(<a href="/wiki/%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E6%95%B4%E6%95%B0%E5%88%97%E5%A4%A7%E8%BE%9E%E5%85%B8" title="オンライン整数列大辞典">オンライン整数列大辞典</a>の数列 <a rel="nofollow" class="external text" href="//oeis.org/A025415">A025415</a>)</li> <li>161 = 4<sup>2</sup> + 8<sup>2</sup> + 9<sup>2</sup> <ul><li><i>n</i> = 2 のときの 4<sup><i>n</i></sup> + 8<sup><i>n</i></sup> + 9<sup><i>n</i></sup> の値とみたとき1つ前は<a href="/wiki/21" title="21">21</a>、次は1305。(<a href="/wiki/%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E6%95%B4%E6%95%B0%E5%88%97%E5%A4%A7%E8%BE%9E%E5%85%B8" title="オンライン整数列大辞典">オンライン整数列大辞典</a>の数列 <a rel="nofollow" class="external text" href="//oeis.org/A074541">A074541</a>)</li></ul></li></ul></li> <li>161 = 1<sup>3</sup> + 2<sup>3</sup> + 3<sup>3</sup> + 5<sup>3</sup> <ul><li>4つの正の数の<a href="/wiki/%E7%AB%8B%E6%96%B9%E6%95%B0" title="立方数">立方数</a>の和で表せる35番目の数である。1つ前は<a href="/wiki/156" title="156">156</a>、次は<a href="/wiki/163" title="163">163</a>。(<a href="/wiki/%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E6%95%B4%E6%95%B0%E5%88%97%E5%A4%A7%E8%BE%9E%E5%85%B8" title="オンライン整数列大辞典">オンライン整数列大辞典</a>の数列 <a rel="nofollow" class="external text" href="//oeis.org/A003327">A003327</a>)</li> <li>異なる正の数の4つの<a href="/wiki/%E7%AB%8B%E6%96%B9%E6%95%B0" title="立方数">立方数</a>の和1通りで表せる2番目の数である。1つ前は<a href="/wiki/100" title="100">100</a>、次は<a href="/wiki/198" title="198">198</a>。(<a href="/wiki/%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E6%95%B4%E6%95%B0%E5%88%97%E5%A4%A7%E8%BE%9E%E5%85%B8" title="オンライン整数列大辞典">オンライン整数列大辞典</a>の数列 <a rel="nofollow" class="external text" href="//oeis.org/A025408">A025408</a>)</li> <li><i>n</i> = 3 のときの 1<sup><i>n</i></sup> + 2<sup><i>n</i></sup> + 3<sup><i>n</i></sup> + 5<sup><i>n</i></sup> の値とみたとき1つ前は<a href="/wiki/39" title="39">39</a>、次は<a href="/wiki/723" title="723">723</a>。</li> <li>161 = (<style data-mw-deduplicate="TemplateStyles:r89142261">.mw-parser-output .sfrac{white-space:nowrap}.mw-parser-output .sfrac.tion,.mw-parser-output .sfrac .tion{display:inline-block;vertical-align:-0.5em;font-size:85%;text-align:center}.mw-parser-output .sfrac .num,.mw-parser-output .sfrac .den{display:block;line-height:1em;margin:0 0.1em}.mw-parser-output .sfrac .den{border-top:1px solid}.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}</style><span role="math" class="sfrac tion"><span class="num">3−1</span><span class="sr-only">/</span><span class="den">2</span></span>)<sup>2</sup> + (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r89142261" /><span role="math" class="sfrac tion"><span class="num">5−1</span><span class="sr-only">/</span><span class="den">2</span></span>)<sup>2</sup> + (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r89142261" /><span role="math" class="sfrac tion"><span class="num">7−1</span><span class="sr-only">/</span><span class="den">2</span></span>)<sup>2</sup> + (<link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r89142261" /><span role="math" class="sfrac tion"><span class="num">11−1</span><span class="sr-only">/</span><span class="den">2</span></span>)<sup>2</sup></li></ul></li> <li>161 = 2 × 9<sup>2</sup> − 1 <ul><li><i>x</i> = 9 のときの <a href="/wiki/%E3%83%81%E3%82%A7%E3%83%93%E3%82%B7%E3%82%A7%E3%83%95%E5%A4%9A%E9%A0%85%E5%BC%8F" title="チェビシェフ多項式">チェビシェフ多項式</a><i>T</i><sub>2</sub>(<i>x</i>) = 2<i>x</i><sup>2</sup> − 1 の値とみたとき1つ前は<a href="/wiki/127" title="127">127</a>、次は<a href="/wiki/199" title="199">199</a>。(<a href="/wiki/%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E6%95%B4%E6%95%B0%E5%88%97%E5%A4%A7%E8%BE%9E%E5%85%B8" title="オンライン整数列大辞典">オンライン整数列大辞典</a>の数列 <a rel="nofollow" class="external text" href="//oeis.org/A056220">A056220</a>)</li></ul></li> <li>161 = 15<sup>2</sup> − 64 <ul><li><i>n</i> = 15 のときの <i>n</i><sup>2</sup> − 64 の値とみたとき1つ前は<a href="/wiki/132" title="132">132</a>、次は<a href="/wiki/192" title="192">192</a>。(<a href="/wiki/%E3%82%AA%E3%83%B3%E3%83%A9%E3%82%A4%E3%83%B3%E6%95%B4%E6%95%B0%E5%88%97%E5%A4%A7%E8%BE%9E%E5%85%B8" title="オンライン整数列大辞典">オンライン整数列大辞典</a>の数列 <a rel="nofollow" class="external text" href="//oeis.org/A098849">A098849</a>)</li></ul></li></ul> <div class="mw-heading mw-heading2"><h2 id="その他161に関連すること"><span id=".E3.81.9D.E3.81.AE.E4.BB.96161.E3.81.AB.E9.96.A2.E9.80.A3.E3.81.99.E3.82.8B.E3.81.93.E3.81.A8"></span>その他161に関連すること</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=161&action=edit&section=2" title="節を編集: その他161に関連すること"><span>編集</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/%E8%A5%BF%E6%9A%A6" title="西暦">西暦</a><a href="/wiki/161%E5%B9%B4" title="161年">161年</a></li> <li>日本<a href="/wiki/%E3%83%97%E3%83%AD%E9%87%8E%E7%90%83" title="プロ野球">プロ野球</a>のシーズン最多<a href="/wiki/%E6%89%93%E7%82%B9" title="打点">打点</a>は<a href="/wiki/1950%E5%B9%B4" title="1950年">1950年</a>に<a href="/wiki/%E6%9D%BE%E7%AB%B9%E3%83%AD%E3%83%93%E3%83%B3%E3%82%B9" title="松竹ロビンス">松竹ロビンス</a>の<a href="/wiki/%E5%B0%8F%E9%B6%B4%E8%AA%A0" title="小鶴誠">小鶴誠</a>選手が樹立した161打点である。</li> <li><a href="/wiki/%E5%9B%BD%E9%89%84161%E7%B3%BB%E9%9B%BB%E8%BB%8A#161系" class="mw-redirect" title="国鉄161系電車">国鉄161系電車</a></li> <li><a href="/wiki/%E3%83%A8%E3%83%8F%E3%83%B3%E3%83%BB%E3%82%BC%E3%83%90%E3%82%B9%E3%83%86%E3%82%A3%E3%82%A2%E3%83%B3%E3%83%BB%E3%83%90%E3%83%83%E3%83%8F" title="ヨハン・ゼバスティアン・バッハ">バッハ</a>作曲の<a href="/wiki/%E3%82%AB%E3%83%B3%E3%82%BF%E3%83%BC%E3%82%BF" title="カンタータ">カンタータ</a>「<a href="/wiki/%E6%9D%A5%E3%81%9F%E3%82%8C%E3%80%81%E6%B1%9D%E7%94%98%E3%81%8D%E6%AD%BB%E3%81%AE%E6%99%82%E3%82%88" title="来たれ、汝甘き死の時よ">来たれ、汝甘き死の時よ</a>」の<a href="/wiki/BWV" class="mw-redirect" title="BWV">BWV</a>番号。</li> <li>第161代<a href="/wiki/%E6%95%99%E7%9A%87" title="教皇">ローマ教皇</a>は<a href="/wiki/%E3%82%B2%E3%83%A9%E3%82%B7%E3%82%A6%E3%82%B92%E4%B8%96_(%E3%83%AD%E3%83%BC%E3%83%9E%E6%95%99%E7%9A%87)" title="ゲラシウス2世 (ローマ教皇)">ゲラシウス2世</a>（在位：<a href="/wiki/1118%E5%B9%B4" title="1118年">1118年</a><a href="/wiki/1%E6%9C%8824%E6%97%A5" title="1月24日">1月24日</a>～<a href="/wiki/1119%E5%B9%B4" title="1119年">1119年</a><a href="/wiki/1%E6%9C%8829%E6%97%A5" title="1月29日">1月29日</a>）である。</li> <li><a href="/wiki/%E5%B9%B4%E5%A7%8B" title="年始">年始</a>から161日目の日付は<a href="/wiki/6%E6%9C%8810%E6%97%A5" title="6月10日">6月10日</a>（<a href="/wiki/%E9%96%8F%E5%B9%B4" title="閏年">閏年</a>だと<a href="/wiki/6%E6%9C%889%E6%97%A5" title="6月9日">6月9日</a>）。</li></ul> <div class="mw-heading mw-heading2"><h2 id="脚注"><span id=".E8.84.9A.E6.B3.A8"></span>脚注</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=161&action=edit&section=3" title="節を編集: 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