Q: What is the sum of all factors of the number 19,305 excluding 19,305?

 A: 21,015

Why is 21,015 the sum of all factors of 19,305, excluding 19,305?

The factors of the number 19,305 are: 1, 3, 5, 9, 11, 13, 15, 27, 33, 39, 45, 55, 65, 99, 117, 135, 143, 165, 195, 297, 351, 429, 495, 585, 715, 1287, 1485, 1755, 2145, 3861, 6435, 19305.

If you add them up, you will get the total of 19,326. Now subtract 19,305 to get 21,015


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