Q: What is the sum of all factors of the number 687,071,235 excluding 687,071,235?

A: 505,316,157

Why is 505,316,157 the sum of all factors of 687,071,235, excluding 687,071,235?

The factors of the number 687,071,235 are: 1, 3, 5, 15, 17, 41, 51, 85, 123, 205, 255, 615, 697, 2091, 3485, 10455, 65717, 197151, 328585, 985755, 1117189, 2694397, 3351567, 5585945, 8083191, 13471985, 16757835, 40415955, 45804749, 137414247, 229023745, 687071235.

If you add them up, you will get the total of 687,071,740. Now subtract 687,071,235 to get 505,316,157