Q: What is the sum of all factors of the number 39,905 excluding 39,905?

 A: 10,207

Why is 10,207 the sum of all factors of 39,905, excluding 39,905?

The factors of the number 39,905 are: 1, 5, 23, 115, 347, 1735, 7981, 39905.

If you add them up, you will get the total of 39,915. Now subtract 39,905 to get 10,207


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