Q: What is the sum of all factors of the number 213,065,565 excluding 213,065,565?

A: 138,565,155

Why is 138,565,155 the sum of all factors of 213,065,565, excluding 213,065,565?

The factors of the number 213,065,565 are: 1, 3, 5, 15, 53, 83, 159, 249, 265, 415, 795, 1245, 3229, 4399, 9687, 13197, 16145, 21995, 48435, 65985, 171137, 268007, 513411, 804021, 855685, 1340035, 2567055, 4020105, 14204371, 42613113, 71021855, 213065565.

If you add them up, you will get the total of 213,065,703. Now subtract 213,065,565 to get 138,565,155