Q: What is the sum of all factors of the number 85,905 excluding 85,905?

 A: 71,343

Why is 71,343 the sum of all factors of 85,905, excluding 85,905?

The factors of the number 85,905 are: 1, 3, 5, 9, 15, 23, 45, 69, 83, 115, 207, 249, 345, 415, 747, 1035, 1245, 1909, 3735, 5727, 9545, 17181, 28635, 85905.

If you add them up, you will get the total of 85,976. Now subtract 85,905 to get 71,343


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