Q: What is the sum of all factors of the number 18,009 excluding 18,009?

 A: 10,791

Why is 10,791 the sum of all factors of 18,009, excluding 18,009?

The factors of the number 18,009 are: 1, 3, 9, 23, 27, 29, 69, 87, 207, 261, 621, 667, 783, 2001, 6003, 18009.

If you add them up, you will get the total of 18,019. Now subtract 18,009 to get 10,791


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