Divisor Sum of 285,778

Example of Divisor Sum of Square-Free Integer

 * $\map {\sigma_1} {285 \, 778} = 438 \, 768$

where $\sigma_1$ denotes the divisor sum function.

Proof
We have that:
 * $285 \, 778 = 2 \times 43 \times 3323$

Hence: