perfect number

listen to the pronunciation of perfect number
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A number that is the sum of all of its divisors except itself

The factors of 28 are 1, 2, 4, 7, 14 and 28, and 1 + 2 + 4 + 7 + 14 = 28, so 28 is a perfect number.

A positive integer that is equal to the sum of its positive integral factors, including 1 but excluding itself
perfect numbers
plural form of perfect number
perfect number

    Расстановка переносов

    per·fect num·ber

    Турецкое произношение

    pırfekt nʌmbır

    Произношение

    /pərˈfekt ˈnəmbər/ /pɜrˈfɛkt ˈnʌmbɜr/
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