Q: What is the sum of all factors of the number 71,520 excluding 71,520?

A: 155,280

Why is 155,280 the sum of all factors of 71,520, excluding 71,520?

The factors of the number 71,520 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 96, 120, 149, 160, 240, 298, 447, 480, 596, 745, 894, 1192, 1490, 1788, 2235, 2384, 2980, 3576, 4470, 4768, 5960, 7152, 8940, 11920, 14304, 17880, 23840, 35760, 71520.

If you add them up, you will get the total of 71,675. Now subtract 71,520 to get 155,280