Q: What is the sum of all factors of the number 515,503,510 excluding 515,503,510?

Why is 420,917,690 the sum of all factors of 515,503,510, excluding 515,503,510?

The factors of the number 515,503,510 are: 1, 2, 5, 10, 109, 218, 545, 1090, 472939, 945878, 2364695, 4729390, 51550351, 103100702, 257751755, 515503510.

If you add them up, you will get the total of 515,503,930. Now subtract 515,503,510 to get 420,917,690

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