Q: What is the sum of all factors of the number 128,121 excluding 128,121?

 A: 67,143

Why is 67,143 the sum of all factors of 128,121, excluding 128,121?

The factors of the number 128,121 are: 1, 3, 7, 21, 6101, 18303, 42707, 128121.

If you add them up, you will get the total of 128,188. Now subtract 128,121 to get 67,143


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