Q: What is the sum of all factors of the number 1,131,280 excluding 1,131,280?

A: 1,547,120

Why is 1,547,120 the sum of all factors of 1,131,280, excluding 1,131,280?

The factors of the number 1,131,280 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 179, 316, 358, 395, 632, 716, 790, 895, 1264, 1432, 1580, 1790, 2864, 3160, 3580, 6320, 7160, 14141, 14320, 28282, 56564, 70705, 113128, 141410, 226256, 282820, 565640, 1131280.

If you add them up, you will get the total of 1,131,281. Now subtract 1,131,280 to get 1,547,120