Divisor Sum of 23,625

Example of Divisor Sum of Integer

 * $\map {\sigma_1} {23 \, 625} = 49 \, 920$

where $\sigma_1$ denotes the divisor sum function.

Proof
We have that:
 * $23 \, 625 = 3^3 \times 5^3 \times 7$

Hence: