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完全数 (かんぜんすう) Japanese meaning | Kotomora

完かん全ぜん数すう

か

ん

ぜ

ん

す

う

Meanings

1

noun

perfect number

A positive integer that equals the sum of its proper divisors (e.g., 6 = 1+2+3). Used in number theory.

6は最さい小しょうの完かん全ぜん数すうである。
6 is the smallest perfect number.
完かん全ぜん数すうは古こ代だいギリシャの数すう学がく者しゃによって研けん究きゅうさ

れ

た

。

Perfect numbers were studied by ancient Greek mathematicians.

Kanji

完perfect, completion, end
全whole, entire, all
数number, strength, fate

Similar words

友ゆう愛あい数すう
Amicable numbers are pairs where each number equals the sum of the other's proper divisors, unlike a perfect number which equals the sum of its own proper divisors.
過か剰じょう数すう
An abundant number is one where the sum of its proper divisors exceeds the number itself, the opposite of a deficient number.

Etymology

Compound of 完全 (kanzen, 'complete, perfect') and 数 (sū, 'number'). The term is a direct translation of the English 'perfect number', which itself comes from Latin 'numerus perfectus'.