Q: What is the sum of all factors of the number 39,420 excluding 39,420?

A: 84,900

Why is 84,900 the sum of all factors of 39,420, excluding 39,420?

The factors of the number 39,420 are: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 73, 90, 108, 135, 146, 180, 219, 270, 292, 365, 438, 540, 657, 730, 876, 1095, 1314, 1460, 1971, 2190, 2628, 3285, 3942, 4380, 6570, 7884, 9855, 13140, 19710, 39420.

If you add them up, you will get the total of 39,504. Now subtract 39,420 to get 84,900