Q: What is the sum of all factors of the number 21,909 excluding 21,909?

 A: 8,011

Why is 8,011 the sum of all factors of 21,909, excluding 21,909?

The factors of the number 21,909 are: 1, 3, 67, 109, 201, 327, 7303, 21909.

If you add them up, you will get the total of 21,917. Now subtract 21,909 to get 8,011


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