Q: What is the sum of all factors of the number 20,905 excluding 20,905?

 A: 5,087

Why is 5,087 the sum of all factors of 20,905, excluding 20,905?

The factors of the number 20,905 are: 1, 5, 37, 113, 185, 565, 4181, 20905.

If you add them up, you will get the total of 20,910. Now subtract 20,905 to get 5,087


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