perfect number

English

Noun

perfect number (plural perfect numbers)

(number theory) 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.

Translations

a number that is the sum of all of its divisors except itself

Catalan: nombre perfecte
Chinese:
Mandarin: 完全數 (zh), 完全数 (zh) (wánquánshù)
Dutch: perfect getal
Finnish: täydellinen luku
French: nombre parfait (fr) m
German: vollkommene Zahl f, perfekte Zahl f, ideale Zahl f
Icelandic: fullkomin tala f
Japanese: 完全数 (かんせんすう; kanzen-su)

Norwegian: perfekt tall
Portuguese: número perfeito m
Russian: соверше́нное число́ n (soveršénnoje čisló)
Slovak: dokonalé číslo n
Spanish: número perfecto m
Swedish: perfekt tal (sv) n
Tagalog: himpit na bilang
Turkish: mükemmel sayı

See also

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