Q: What is the sum of all factors of the number 421,515,255 excluding 421,515,255?

A: 394,598,409

Why is 394,598,409 the sum of all factors of 421,515,255, excluding 421,515,255?

The factors of the number 421,515,255 are: 1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 236143, 708429, 1180715, 1653001, 3542145, 4014431, 4959003, 8265005, 12043293, 20072155, 24795015, 28101017, 60216465, 84303051, 140505085, 421515255.

If you add them up, you will get the total of 421,515,649. Now subtract 421,515,255 to get 394,598,409