Q: What is the sum of all factors of the number 517,735,521 excluding 517,735,521?

Why is 257,320,839 the sum of all factors of 517,735,521, excluding 517,735,521?

The factors of the number 517,735,521 are: 1, 3, 9, 29, 87, 261, 661, 1983, 3001, 5949, 9003, 19169, 27009, 57507, 87029, 172521, 261087, 783261, 1983661, 5950983, 17852949, 57526169, 172578507, 517735521.

If you add them up, you will get the total of 517,735,778. Now subtract 517,735,521 to get 257,320,839

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