Q: What is the sum of all factors of the number 309,987 excluding 309,987?
A: 169,173
The factors of the number 309,987 are: 1, 3, 9, 27, 43, 81, 89, 129, 267, 387, 801, 1161, 2403, 3483, 3827, 7209, 11481, 34443, 103329, 309987.
If you add them up, you will get the total of 310,156. Now subtract 309,987 to get 169,173