Q: What is the sum of all factors of the number 87,381 excluding 87,381?

 A: 66,539

Why is 66,539 the sum of all factors of 87,381, excluding 87,381?

The factors of the number 87,381 are: 1, 3, 7, 9, 19, 21, 57, 63, 73, 133, 171, 219, 399, 511, 657, 1197, 1387, 1533, 4161, 4599, 9709, 12483, 29127, 87381.

If you add them up, you will get the total of 87,447. Now subtract 87,381 to get 66,539


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