noun · common

perfect number

perfect number · perfect numbers

совершенное число

perfekte Zahl, ideale Zahl, vollkommene Zahl

A number that is the sum of all of its divisors except itselfA number that is the sum of all of its divisors except itself.

» It's the perfect number.

Это идеальное число.

Це ідеальне число.

Meaning

1 senses

A number that is the sum of all of its divisors except itself.
The factors of 6 are 1, 2, 3 and 6, and 1 + 2 + 3 = 6, so 6 is a perfect number.
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.
vollkommene Zahl, perfekte Zahl, ideale Zahl
соверше́нное число́soveršénnoje čisló

2 sentences

It's the perfect number.
Це ідеальне число.
ruЭто идеальное число.
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It is unknown whether any odd perfect numbers exist.
ruНеизвестно, существуют ли нечётные совершенные числа.
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