Q: What is the sum of all factors of the number 661,240 excluding 661,240?
A: 856,520
The factors of the number 661,240 are: 1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 271, 305, 488, 542, 610, 1084, 1220, 1355, 2168, 2440, 2710, 5420, 10840, 16531, 33062, 66124, 82655, 132248, 165310, 330620, 661240.
If you add them up, you will get the total of 662,096. Now subtract 661,240 to get 856,520