Q: What is the sum of all factors of the number 87,640 excluding 87,640?
A: 138,440
The factors of the number 87,640 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 313, 626, 1252, 1565, 2191, 2504, 3130, 4382, 6260, 8764, 10955, 12520, 17528, 21910, 43820, 87640.
If you add them up, you will get the total of 87,778. Now subtract 87,640 to get 138,440