Q: What is the sum of all factors of the number 20,817 excluding 20,817?

 A: 10,401

Why is 10,401 the sum of all factors of 20,817, excluding 20,817?

The factors of the number 20,817 are: 1, 3, 9, 27, 81, 257, 771, 2313, 6939, 20817.

If you add them up, you will get the total of 20,827. Now subtract 20,817 to get 10,401


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