Q: What is the sum of all factors of the number 402,720 excluding 402,720?

A: 867,360

Why is 867,360 the sum of all factors of 402,720, excluding 402,720?

The factors of the number 402,720 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 96, 120, 160, 240, 480, 839, 1678, 2517, 3356, 4195, 5034, 6712, 8390, 10068, 12585, 13424, 16780, 20136, 25170, 26848, 33560, 40272, 50340, 67120, 80544, 100680, 134240, 201360, 402720.

If you add them up, you will get the total of 403,587. Now subtract 402,720 to get 867,360