Q: What is the sum of all factors of the number 864 excluding 864?

 A: 1,656

Why is 1,656 the sum of all factors of 864, excluding 864?

The factors of the number 864 are: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 32, 36, 48, 54, 72, 96, 108, 144, 216, 288, 432, 864.

If you add them up, you will get the total of 865. Now subtract 864 to get 1,656


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