Q: What is the sum of all factors of the number 128,840 excluding 128,840?
A: 161,140
The factors of the number 128,840 are: 1, 2, 4, 5, 8, 10, 20, 40, 3221, 6442, 12884, 16105, 25768, 32210, 64420, 128840.
If you add them up, you will get the total of 129,001. Now subtract 128,840 to get 161,140