Q: What is the sum of all factors of the number 258,309 excluding 258,309?

 A: 128,987

Why is 128,987 the sum of all factors of 258,309, excluding 258,309?

The factors of the number 258,309 are: 1, 3, 9, 27, 81, 243, 1063, 3189, 9567, 28701, 86103, 258309.

If you add them up, you will get the total of 258,437. Now subtract 258,309 to get 128,987


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