Q: What is the sum of all factors of the number 109,905 excluding 109,905?

 A: 76,719

Why is 76,719 the sum of all factors of 109,905, excluding 109,905?

The factors of the number 109,905 are: 1, 3, 5, 15, 17, 51, 85, 255, 431, 1293, 2155, 6465, 7327, 21981, 36635, 109905.

If you add them up, you will get the total of 109,981. Now subtract 109,905 to get 76,719


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