Q: What is the sum of all factors of the number 391,377,520 excluding 391,377,520?

A: 519,657,920

Why is 519,657,920 the sum of all factors of 391,377,520, excluding 391,377,520?

The factors of the number 391,377,520 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1019, 2038, 4076, 4801, 5095, 8152, 9602, 10190, 16304, 19204, 20380, 24005, 38408, 40760, 48010, 76816, 81520, 96020, 192040, 384080, 4892219, 9784438, 19568876, 24461095, 39137752, 48922190, 78275504, 97844380, 195688760, 391377520.

If you add them up, you will get the total of 391,378,039. Now subtract 391,377,520 to get 519,657,920