🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaTiếng ViệtРусский한국어中文日本語EntityQ2145900· pop 23· linked from 71 articlesweird numberabundant number that is not semiperfectAvailable in 22 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoCzechEsperantoFinnishConnectionsprime numberEntitydivisorEntityCategoriesDivisor functionInteger sequences