Q: What is the sum of all factors of the number 138,721 excluding 138,721?

 A: 12,623

Why is 12,623 the sum of all factors of 138,721, excluding 138,721?

The factors of the number 138,721 are: 1, 11, 12611, 138721.

If you add them up, you will get the total of 138,733. Now subtract 138,721 to get 12,623


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