Q: What is the sum of all factors of the number 221,100,621 excluding 221,100,621?

A: 121,043,379

Why is 121,043,379 the sum of all factors of 221,100,621, excluding 221,100,621?

The factors of the number 221,100,621 are: 1, 3, 7, 21, 131, 179, 393, 449, 537, 917, 1253, 1347, 2751, 3143, 3759, 9429, 23449, 58819, 70347, 80371, 164143, 176457, 241113, 411733, 492429, 562597, 1235199, 1687791, 10528601, 31585803, 73700207, 221100621.

If you add them up, you will get the total of 221,100,742. Now subtract 221,100,621 to get 121,043,379