Divisor Sum of 31,704

Example of Divisor Sum of Integer

 * $\map {\sigma_1} {31 \, 704} = 79 \, 320$

where $\sigma_1$ denotes the divisor sum function.

Proof
We have that:
 * $31 \, 704 = 2^3 \times 3 \times 1321$

Hence: