Q: What is the sum of all factors of the number 640,774 excluding 640,774?

 A: 320,390

Why is 320,390 the sum of all factors of 640,774, excluding 640,774?

The factors of the number 640,774 are: 1, 2, 320387, 640774.

If you add them up, you will get the total of 641,094. Now subtract 640,774 to get 320,390


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