Q: What is the sum of all factors of the number 209,890 excluding 209,890?
A: 173,150
The factors of the number 209,890 are: 1, 2, 5, 10, 139, 151, 278, 302, 695, 755, 1390, 1510, 20989, 41978, 104945, 209890.
If you add them up, you will get the total of 210,063. Now subtract 209,890 to get 173,150