hyperperfect number
Sign in to saveAlso known as k-hyperperfect number
natural number n for which the equality n=1+k(σ(n)−n−1) holds for some k
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prime number
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figurate number
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sociable number
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automorphic number
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International Standard Book Number
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natural number
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integer
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number theory
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digital object identifier
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digit
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binary numeral system
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exponentiation
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numeral system
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three-dimensional space
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parity
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natural language
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composite number
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fundamental theorem of arithmetic
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perfect number
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divisor
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