Q: What is the sum of all factors of the number 172,440 excluding 172,440?

A: 389,160

Why is 389,160 the sum of all factors of 172,440, excluding 172,440?

The factors of the number 172,440 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360, 479, 958, 1437, 1916, 2395, 2874, 3832, 4311, 4790, 5748, 7185, 8622, 9580, 11496, 14370, 17244, 19160, 21555, 28740, 34488, 43110, 57480, 86220, 172440.

If you add them up, you will get the total of 172,829. Now subtract 172,440 to get 389,160