Q: What is the sum of all factors of the number 21,870 excluding 21,870?
A: 37,170
The factors of the number 21,870 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 243, 270, 405, 486, 729, 810, 1215, 1458, 2187, 2430, 3645, 4374, 7290, 10935, 21870.
If you add them up, you will get the total of 21,907. Now subtract 21,870 to get 37,170