Q: What is the sum of all factors of the number 19,780 excluding 19,780?
A: 24,572
The factors of the number 19,780 are: 1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1978, 3956, 4945, 9890, 19780.
If you add them up, you will get the total of 19,804. Now subtract 19,780 to get 24,572