Q: What is the sum of all factors of the number 21,242 excluding 21,242?

 A: 15,718

Why is 15,718 the sum of all factors of 21,242, excluding 21,242?

The factors of the number 21,242 are: 1, 2, 13, 19, 26, 38, 43, 86, 247, 494, 559, 817, 1118, 1634, 10621, 21242.

If you add them up, you will get the total of 21,257. Now subtract 21,242 to get 15,718


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