Q: What is the sum of all factors of the number 81,980 excluding 81,980?
A: 90,220
The factors of the number 81,980 are: 1, 2, 4, 5, 10, 20, 4099, 8198, 16396, 20495, 40990, 81980.
If you add them up, you will get the total of 82,070. Now subtract 81,980 to get 90,220