Q: What is the sum of all factors of the number 128,780 excluding 128,780?

 A: 149,428

Why is 149,428 the sum of all factors of 128,780, excluding 128,780?

The factors of the number 128,780 are: 1, 2, 4, 5, 10, 20, 47, 94, 137, 188, 235, 274, 470, 548, 685, 940, 1370, 2740, 6439, 12878, 25756, 32195, 64390, 128780.

If you add them up, you will get the total of 128,929. Now subtract 128,780 to get 149,428


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