Q: What is the sum of all factors of the number 21,510 excluding 21,510?

 A: 34,650

Why is 34,650 the sum of all factors of 21,510, excluding 21,510?

The factors of the number 21,510 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 239, 478, 717, 1195, 1434, 2151, 2390, 3585, 4302, 7170, 10755, 21510.

If you add them up, you will get the total of 21,544. Now subtract 21,510 to get 34,650


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