1. Deficient numberIn number theory, a deficient number or defective number is a number n for which the sum of divisors σ(n)<2n, or, equivalently, the sum of proper divisors s(n) Read “Deficient number” on English Wikipedia
Read “不足数” on Japanese Wikipedia
Read “Deficient number” on DBpedia
Read “不足数” on Japanese Wikipedia
Read “Deficient number” on DBpedia
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