Q: What is the sum of all factors of the number 81,915 excluding 81,915?

 A: 53,253

Why is 53,253 the sum of all factors of 81,915, excluding 81,915?

The factors of the number 81,915 are: 1, 3, 5, 15, 43, 127, 129, 215, 381, 635, 645, 1905, 5461, 16383, 27305, 81915.

If you add them up, you will get the total of 81,968. Now subtract 81,915 to get 53,253


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