Q: What is the sum of all factors of the number 128,890 excluding 128,890?

 A: 103,130

Why is 103,130 the sum of all factors of 128,890, excluding 128,890?

The factors of the number 128,890 are: 1, 2, 5, 10, 12889, 25778, 64445, 128890.

If you add them up, you will get the total of 128,993. Now subtract 128,890 to get 103,130


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