sigma: Sum of all divisors of a natural number n

Description Usage Arguments Details Examples

Description

σ(n): Sum of all divisors of a natural number n.

Usage

1
2
  sigma(n)
  

Arguments

n

A non-negative integer

Details

Works well up to around 10⁹.

Examples

1
2
3
  sigma(100)=217
  sigma(10) =18 (=1+2+5+10)
  

tiberius7777/R-numtheory documentation built on May 31, 2019, 11:20 a.m.