Q: What is the sum of all factors of the number 20,811,280 excluding 20,811,280?

A: 35,485,340

Why is 35,485,340 the sum of all factors of 20,811,280, excluding 20,811,280?

The factors of the number 20,811,280 are: 1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5309, 10618, 21236, 26545, 37163, 42472, 53090, 74326, 84944, 106180, 148652, 185815, 212360, 260141, 297304, 371630, 424720, 520282, 594608, 743260, 1040564, 1300705, 1486520, 2081128, 2601410, 2973040, 4162256, 5202820, 10405640, 20811280.

If you add them up, you will get the total of 20,811,315. Now subtract 20,811,280 to get 35,485,340