Why is 1,243 the sum of all factors of 3,965, excluding 3,965?
The factors of the number 3,965 are: 1, 5, 13, 61, 65, 305, 793, 3965.
If you add them up, you will get the total of 3,966. Now subtract 3,965 to get 1,243
More numbers for you to try...
Try the
factor calculator