Q: What is the sum of all factors of the number 13,840 excluding 13,840?

 A: 18,524

Why is 18,524 the sum of all factors of 13,840, excluding 13,840?

The factors of the number 13,840 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 173, 346, 692, 865, 1384, 1730, 2768, 3460, 6920, 13840.

If you add them up, you will get the total of 13,858. Now subtract 13,840 to get 18,524


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