Divisor Sum of 285,778

Example of Sigma Function of Square-Free Integer

 * $\sigma \left({285 \, 778}\right) = 438 \, 768$

where $\sigma$ denotes the $\sigma$ function.

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

Hence: