Q: What is the sum of all factors of the number 128,500 excluding 128,500?

 A: 153,236

Why is 153,236 the sum of all factors of 128,500, excluding 128,500?

The factors of the number 128,500 are: 1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 257, 500, 514, 1028, 1285, 2570, 5140, 6425, 12850, 25700, 32125, 64250, 128500.

If you add them up, you will get the total of 128,653. Now subtract 128,500 to get 153,236


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