Q: What is the sum of all factors of the number 425,780 excluding 425,780?

 A: 485,620

Why is 485,620 the sum of all factors of 425,780, excluding 425,780?

The factors of the number 425,780 are: 1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 349, 610, 698, 1220, 1396, 1745, 3490, 6980, 21289, 42578, 85156, 106445, 212890, 425780.

If you add them up, you will get the total of 426,265. Now subtract 425,780 to get 485,620


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