Q: What is the sum of all factors of the number 391,040 excluding 391,040?

A: 637,120

Why is 637,120 the sum of all factors of 391,040, excluding 391,040?

The factors of the number 391,040 are: 1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 47, 52, 64, 65, 80, 94, 104, 128, 130, 160, 188, 208, 235, 260, 320, 376, 416, 470, 520, 611, 640, 752, 832, 940, 1040, 1222, 1504, 1664, 1880, 2080, 2444, 3008, 3055, 3760, 4160, 4888, 6016, 6110, 7520, 8320, 9776, 12220, 15040, 19552, 24440, 30080, 39104, 48880, 78208, 97760, 195520, 391040.

If you add them up, you will get the total of 391,677. Now subtract 391,040 to get 637,120