Q: What is the sum of all factors of the number 213,423,255 excluding 213,423,255?

A: 172,227,465

Why is 172,227,465 the sum of all factors of 213,423,255, excluding 213,423,255?

The factors of the number 213,423,255 are: 1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 269, 405, 653, 807, 1215, 1345, 1959, 2421, 3265, 4035, 5877, 7263, 9795, 12105, 17631, 21789, 29385, 36315, 52893, 65367, 88155, 108945, 158679, 175657, 264465, 326835, 526971, 793395, 878285, 1580913, 2634855, 4742739, 7904565, 14228217, 23713695, 42684651, 71141085, 213423255.

If you add them up, you will get the total of 213,423,427. Now subtract 213,423,255 to get 172,227,465