Q: What is the sum of all factors of the number 390,405 excluding 390,405?
A: 271,419
The factors of the number 390,405 are: 1, 3, 5, 15, 17, 51, 85, 255, 1531, 4593, 7655, 22965, 26027, 78081, 130135, 390405.
If you add them up, you will get the total of 390,676. Now subtract 390,405 to get 271,419