Q: What is the sum of all factors of the number 312,720 excluding 312,720?

A: 657,456

Why is 657,456 the sum of all factors of 312,720, excluding 312,720?

The factors of the number 312,720 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 1303, 2606, 3909, 5212, 6515, 7818, 10424, 13030, 15636, 19545, 20848, 26060, 31272, 39090, 52120, 62544, 78180, 104240, 156360, 312720.

If you add them up, you will get the total of 313,377. Now subtract 312,720 to get 657,456