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：2025/12/03
divisor function
（ plural ）
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(mathematics) A function yielding the sum of the divisors of an integer. It is denoted by the Greek letter σ (sigma).
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divisor function
The divisor function σ(n) gives the sum of all positive divisors of n and is central to several results in multiplicative number theory.
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The divisor function σ(n) gives the sum of all positive divisors of n and is central to several results in multiplicative number theory.
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