Q: What is the sum of all factors of the number 405,661,100 excluding 405,661,100?

A: 542,340,724

Why is 542,340,724 the sum of all factors of 405,661,100, excluding 405,661,100?

The factors of the number 405,661,100 are: 1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 312047, 624094, 1248188, 1560235, 3120470, 4056611, 6240940, 7801175, 8113222, 15602350, 16226444, 20283055, 31204700, 40566110, 81132220, 101415275, 202830550, 405661100.

If you add them up, you will get the total of 405,661,642. Now subtract 405,661,100 to get 542,340,724