Q: What is the sum of all factors of the number 321,400 excluding 321,400?

 A: 426,320

Why is 426,320 the sum of all factors of 321,400, excluding 321,400?

The factors of the number 321,400 are: 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 1607, 3214, 6428, 8035, 12856, 16070, 32140, 40175, 64280, 80350, 160700, 321400.

If you add them up, you will get the total of 321,826. Now subtract 321,400 to get 426,320


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