Q: What is the sum of all factors of the number 256,072,280 excluding 256,072,280?

A: 320,861,560

Why is 320,861,560 the sum of all factors of 256,072,280, excluding 256,072,280?

The factors of the number 256,072,280 are: 1, 2, 4, 5, 8, 10, 20, 40, 827, 1654, 3308, 4135, 6616, 7741, 8270, 15482, 16540, 30964, 33080, 38705, 61928, 77410, 154820, 309640, 6401807, 12803614, 25607228, 32009035, 51214456, 64018070, 128036140, 256072280.

If you add them up, you will get the total of 256,072,600. Now subtract 256,072,280 to get 320,861,560