Q: What is the sum of all factors of the number 1,243,905 excluding 1,243,905?
A: 899,775
The factors of the number 1,243,905 are: 1, 3, 5, 13, 15, 39, 65, 195, 6379, 19137, 31895, 82927, 95685, 248781, 414635, 1243905.
If you add them up, you will get the total of 1,244,804. Now subtract 1,243,905 to get 899,775