Difference between revisions of "Sum of divisors"
From specialfunctionswiki
m (Tom moved page Sum of positive divisors function to Sum of divisors) |
|||
| Line 1: | Line 1: | ||
| − | The sum of positive divisors function, $\ | + | The sum of positive divisors function, $\sigma$, is defined by |
| − | $$\ | + | $$\sigma(n) = \displaystyle\sum_{d|n} d,$$ |
where $d|n$ denotes that $d$ is a [[divisor]] of $n$. | where $d|n$ denotes that $d$ is a [[divisor]] of $n$. | ||
Revision as of 21:46, 16 August 2015
The sum of positive divisors function, $\sigma$, is defined by $$\sigma(n) = \displaystyle\sum_{d|n} d,$$ where $d|n$ denotes that $d$ is a divisor of $n$.
