Q: What is the sum of all factors of the number 561,270,765 excluding 561,270,765?

A: 421,325,331

Why is 421,325,331 the sum of all factors of 561,270,765, excluding 561,270,765?

The factors of the number 561,270,765 are: 1, 3, 5, 11, 15, 33, 55, 165, 347, 1041, 1735, 3817, 5205, 9803, 11451, 19085, 29409, 49015, 57255, 107833, 147045, 323499, 539165, 1617495, 3401641, 10204923, 17008205, 37418051, 51024615, 112254153, 187090255, 561270765.

If you add them up, you will get the total of 561,271,186. Now subtract 561,270,765 to get 421,325,331