Q: What is the sum of all factors of the number 31,121,325 excluding 31,121,325?

A: 25,039,143

Why is 25,039,143 the sum of all factors of 31,121,325, excluding 31,121,325?

The factors of the number 31,121,325 are: 1, 3, 5, 9, 15, 25, 45, 75, 157, 225, 471, 785, 881, 1413, 2355, 2643, 3925, 4405, 7065, 7929, 11775, 13215, 22025, 35325, 39645, 66075, 138317, 198225, 414951, 691585, 1244853, 2074755, 3457925, 6224265, 10373775, 31121325.

If you add them up, you will get the total of 31,121,350. Now subtract 31,121,325 to get 25,039,143