Divisor Sum of 11,025

Example of Divisor Sum of Integer

 * $\map {\sigma_1} {11 \, 025} = 22 \, 971$

where $\sigma_1$ denotes the divisor sum function.

Proof
We have that:
 * $11 \, 025 = 3^2 \times 5^2 \times 7^2$

Hence: