Q: What is the sum of all factors of the number 420,740 excluding 420,740?

 A: 475,540

Why is 475,540 the sum of all factors of 420,740, excluding 420,740?

The factors of the number 420,740 are: 1, 2, 4, 5, 10, 20, 109, 193, 218, 386, 436, 545, 772, 965, 1090, 1930, 2180, 3860, 21037, 42074, 84148, 105185, 210370, 420740.

If you add them up, you will get the total of 421,215. Now subtract 420,740 to get 475,540


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