Q: What is the sum of all factors of the number 516,663,640 excluding 516,663,640?

A: 647,916,920

Why is 647,916,920 the sum of all factors of 516,663,640, excluding 516,663,640?

The factors of the number 516,663,640 are: 1, 2, 4, 5, 8, 10, 20, 40, 571, 1142, 2284, 2855, 4568, 5710, 11420, 22621, 22840, 45242, 90484, 113105, 180968, 226210, 452420, 904840, 12916591, 25833182, 51666364, 64582955, 103332728, 129165910, 258331820, 516663640.

If you add them up, you will get the total of 516,664,287. Now subtract 516,663,640 to get 647,916,920