---
tag: 06TK51263Q
kind: concept
name: Sum of divisors
msc: [11A25]
sources:
  - url: https://en.wikipedia.org/wiki/Divisor_function
    locator: lead section
---

## Summary

The sum of divisors $\sigma(n)$ of a positive integer $n$ is the sum of all its positive divisors.
The [[definition of the sum of divisors|009QCP5T3Z]] gives the precise form.