Divisor Sum of 15,435

Example of Divisor Sum of Integer

 * $\map {\sigma_1} {15 \, 435} = 31 \, 200$

where $\sigma_1$ denotes the divisor sum function.

Proof
We have that:
 * $15 \, 435 = 3^2 \times 5 \times 7^3$

Hence: