Q: What is the sum of all factors of the number 21,970 excluding 21,970?
A: 20,870
The factors of the number 21,970 are: 1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 2197, 4394, 10985, 21970.
If you add them up, you will get the total of 21,990. Now subtract 21,970 to get 20,870