Q: What is the sum of all factors of the number 331,780 excluding 331,780?

 A: 380,372

Why is 380,372 the sum of all factors of 331,780, excluding 331,780?

The factors of the number 331,780 are: 1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 313, 530, 626, 1060, 1252, 1565, 3130, 6260, 16589, 33178, 66356, 82945, 165890, 331780.

If you add them up, you will get the total of 332,160. Now subtract 331,780 to get 380,372


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