Q: What is the sum of all factors of the number 402,090 excluding 402,090?
A: 638,166
The factors of the number 402,090 are: 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 1031, 2062, 3093, 5155, 6186, 10310, 13403, 15465, 26806, 30930, 40209, 67015, 80418, 134030, 201045, 402090.
If you add them up, you will get the total of 402,728. Now subtract 402,090 to get 638,166