Q: What is the sum of all factors of the number 15,920 excluding 15,920?
A: 21,280
The factors of the number 15,920 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1592, 1990, 3184, 3980, 7960, 15920.
If you add them up, you will get the total of 15,941. Now subtract 15,920 to get 21,280