完全数

完全数（Perfect number），又稱完美數或完備數，是一些特殊的自然数：它所有的真因子（即除了自身以外的约数）的和，恰好等於它本身，完全数不可能是楔形數、平方數、 ... 完全数-Wikiwand Forfasternavigation,thisIframeispreloadingtheWikiwandpagefor完全数. 完全数 Connectedto: {{::readMoreArticle.title}} 维基百科，自由的百科全书 {{bottomLinkPreText}} {{bottomLinkText}} ThispageisbasedonaWikipediaarticlewrittenby contributors(read/edit). Textisavailableunderthe CCBY-SA4.0license;additionaltermsmayapply. Images,videosandaudioareavailableundertheirrespectivelicenses. Coverphotoisavailableunder{{::mainImage.info.license.name||'Unknown'}}license. Coverphotoisavailableunder{{::mainImage.info.license.name||'Unknown'}}license. Credit: (seeoriginalfile). 完全数 Introduction 完全數的發現 历史 性质 奇完全數 奇完全数的部分条件 Touchard定理 參考 註釋 參考資料 參見 外部链接 {{current.index+1}}of{{items.length}} Date:{{current.info.dateOriginal||'Unknown'}} Date:{{(current.info.date|date:'mediumDate')||'Unknown'}} Credit: Uploadedby:{{current.info.uploadUser}}on{{current.info.uploadDate|date:'mediumDate'}} License:{{current.info.license.usageTerms||current.info.license.name||current.info.license.detected||'Unknown'}} License:{{current.info.license.usageTerms||current.info.license.name||current.info.license.detected||'Unknown'}} ViewfileonWikipedia Suggestascoverphoto Wouldyouliketosuggestthisphotoasthecoverphotoforthisarticle? Yes,thiswouldmakeagoodchoice No,nevermind Thankyouforhelping! Yourinputwillaffectcoverphotoselection,alongwithinputfromotherusers. Listentothisarticle Thanksforreportingthisvideo! {{result.lang}} {{result.T}} Nomatchingarticlesfound Searchforarticlescontaining:{{search.query}} Ohno,there'sbeenanerror [email protected] Letusknowwhatyou'vedonethatcausedthiserror,whatbrowseryou'reusing,andwhetheryouhaveanyspecialextensions/add-onsinstalled. Thankyou!