Q: What is the sum of all factors of the number 666,393 excluding 666,393?
A: 427,623
The factors of the number 666,393 are: 1, 3, 7, 13, 21, 39, 91, 273, 2441, 7323, 17087, 31733, 51261, 95199, 222131, 666393.
If you add them up, you will get the total of 666,820. Now subtract 666,393 to get 427,623