Why is 21,000 the sum of all factors of 9,980, including 9,980?
The factors of the number 9,980 are: 1, 2, 4, 5, 10, 20, 499, 998, 1996, 2495, 4990, 9980.
If you add them up, you will get the total of 21,000.
More numbers for you to try...
Try the
factor calculator