Q: What is the sum of all factors of the number 640,419 excluding 640,419?

 A: 279,213

Why is 279,213 the sum of all factors of 640,419, excluding 640,419?

The factors of the number 640,419 are: 1, 3, 13, 39, 16421, 49263, 213473, 640419.

If you add them up, you will get the total of 640,698. Now subtract 640,419 to get 279,213


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