Q: What is the sum of all factors of the number 402,120 excluding 402,120?

A: 905,940

Why is 905,940 the sum of all factors of 402,120, excluding 402,120?

The factors of the number 402,120 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360, 1117, 2234, 3351, 4468, 5585, 6702, 8936, 10053, 11170, 13404, 16755, 20106, 22340, 26808, 33510, 40212, 44680, 50265, 67020, 80424, 100530, 134040, 201060, 402120.

If you add them up, you will get the total of 403,025. Now subtract 402,120 to get 905,940