Q: What is the sum of all factors of the number 309,978 excluding 309,978?
A: 401,850
The factors of the number 309,978 are: 1, 2, 3, 6, 9, 17, 18, 34, 51, 102, 153, 306, 1013, 2026, 3039, 6078, 9117, 17221, 18234, 34442, 51663, 103326, 154989, 309978.
If you add them up, you will get the total of 310,379. Now subtract 309,978 to get 401,850