Q: What is the sum of all factors of the number 261,361,555 excluding 261,361,555?

A: 127,774,829

Why is 127,774,829 the sum of all factors of 261,361,555, excluding 261,361,555?

The factors of the number 261,361,555 are: 1, 5, 7, 13, 35, 65, 91, 127, 455, 635, 889, 1651, 4445, 4523, 8255, 11557, 22615, 31661, 57785, 58799, 158305, 293995, 411593, 574421, 2057965, 2872105, 4020947, 7467473, 20104735, 37337365, 52272311, 261361555.

If you add them up, you will get the total of 261,361,682. Now subtract 261,361,555 to get 127,774,829