擬似完全数
1. Semiperfect numberIn number theory, a semiperfect number or pseudoperfect number is a natural number n that is equal to the sum of all or some of its proper divisors. A semiperfect number that is equal to the sum of all its proper divisors is a perfect number. The first few semiperfect numbers are 6, 12, 18, 20, 24, 28, 30, 36, 40, ...
Read “Semiperfect number” on English Wikipedia
Read “擬似完全数” on Japanese Wikipedia
Read “Semiperfect number” on DBpedia
Read “Semiperfect number” on English Wikipedia
Read “擬似完全数” on Japanese Wikipedia
Read “Semiperfect number” on DBpedia
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