Q: What is the sum of all factors of the number 9,920 excluding 9,920?

 A: 14,464

Why is 14,464 the sum of all factors of 9,920, excluding 9,920?

The factors of the number 9,920 are: 1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2480, 4960, 9920.

If you add them up, you will get the total of 9,934. Now subtract 9,920 to get 14,464


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