🌐EnglishEnglishEspañolFrançaisItalianoNederlandsPolskiPortuguêsРусский中文日本語EntityQ60679· pop 13· linked from 243 articlesharmonic divisor numberpositive integer whose divisors have a harmonic mean that is an integerAvailable in 13 languagesEspañolFrançais中文日本語РусскийEsperantoHebrewHungarianNederlandsTamilConnectionsprime numberEntityperfect numberEntityCategoriesDivisor functionInteger sequencesNumber theoryPerfect numbers