Q: What is the sum of all factors of the number 7,890 excluding 7,890?
A: 11,118
The factors of the number 7,890 are: 1, 2, 3, 5, 6, 10, 15, 30, 263, 526, 789, 1315, 1578, 2630, 3945, 7890.
If you add them up, you will get the total of 7,901. Now subtract 7,890 to get 11,118