Q: What is the sum of all factors of the number 19,905 excluding 19,905?
A: 11,967
The factors of the number 19,905 are: 1, 3, 5, 15, 1327, 3981, 6635, 19905.
If you add them up, you will get the total of 19,916. Now subtract 19,905 to get 11,967