Q: What is the sum of all factors of the number 138,905 excluding 138,905?

 A: 40,687

Why is 40,687 the sum of all factors of 138,905, excluding 138,905?

The factors of the number 138,905 are: 1, 5, 13, 65, 2137, 10685, 27781, 138905.

If you add them up, you will get the total of 138,945. Now subtract 138,905 to get 40,687


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