Q: What is the sum of all factors of the number 20,320 excluding 20,320?

 A: 28,064

Why is 28,064 the sum of all factors of 20,320, excluding 20,320?

The factors of the number 20,320 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 127, 160, 254, 508, 635, 1016, 1270, 2032, 2540, 4064, 5080, 10160, 20320.

If you add them up, you will get the total of 20,348. Now subtract 20,320 to get 28,064


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