Q: What is the sum of all factors of the number 42,640 excluding 42,640?
A: 66,728
The factors of the number 42,640 are: 1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 205, 208, 260, 328, 410, 520, 533, 656, 820, 1040, 1066, 1640, 2132, 2665, 3280, 4264, 5330, 8528, 10660, 21320, 42640.
If you add them up, you will get the total of 42,706. Now subtract 42,640 to get 66,728