Q: What is the sum of all factors of the number 9,280 excluding 9,280?

 A: 13,580

Why is 13,580 the sum of all factors of 9,280, excluding 9,280?

The factors of the number 9,280 are: 1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 145, 160, 232, 290, 320, 464, 580, 928, 1160, 1856, 2320, 4640, 9280.

If you add them up, you will get the total of 9,293. Now subtract 9,280 to get 13,580


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