Q: What is the sum of all factors of the number 528,409 excluding 528,409?

A: 133,991

Why is 133,991 the sum of all factors of 528,409, excluding 528,409?

The factors of the number 528,409 are: 1, 7, 19, 29, 133, 137, 203, 551, 959, 2603, 3857, 3973, 18221, 27811, 75487, 528409.

If you add them up, you will get the total of 528,542. Now subtract 528,409 to get 133,991

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