Q: What is the sum of all factors of the number 210,987 excluding 210,987?
A: 159,669
The factors of the number 210,987 are: 1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 197, 357, 591, 1071, 1379, 1773, 3349, 4137, 10047, 12411, 23443, 30141, 70329, 210987.
If you add them up, you will get the total of 211,146. Now subtract 210,987 to get 159,669