Q: What is the sum of all factors of the number 216,390 excluding 216,390?
A: 303,018
The factors of the number 216,390 are: 1, 2, 3, 5, 6, 10, 15, 30, 7213, 14426, 21639, 36065, 43278, 72130, 108195, 216390.
If you add them up, you will get the total of 216,693. Now subtract 216,390 to get 303,018