Q: What is the sum of all factors of the number 643,142 excluding 643,142?

 A: 321,574

Why is 321,574 the sum of all factors of 643,142, excluding 643,142?

The factors of the number 643,142 are: 1, 2, 321571, 643142.

If you add them up, you will get the total of 643,463. Now subtract 643,142 to get 321,574


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