Q: What is the sum of all factors of the number 1,280,709 excluding 1,280,709?
A: 660,321
The factors of the number 1,280,709 are: 1, 3, 9, 23, 69, 207, 269, 529, 807, 1587, 2421, 4761, 6187, 18561, 55683, 142301, 426903, 1280709.
If you add them up, you will get the total of 1,281,369. Now subtract 1,280,709 to get 660,321