Q: What is the sum of all factors of the number 423,405 excluding 423,405?
A: 318,141
The factors of the number 423,405 are: 1, 3, 5, 9, 15, 45, 97, 291, 485, 873, 1455, 4365, 9409, 28227, 47045, 84681, 141135, 423405.
If you add them up, you will get the total of 423,723. Now subtract 423,405 to get 318,141