Q: What is the sum of all factors of the number 679,780 excluding 679,780?
A: 784,340
The factors of the number 679,780 are: 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 829, 1658, 3316, 4145, 8290, 16580, 33989, 67978, 135956, 169945, 339890, 679780.
If you add them up, you will get the total of 680,564. Now subtract 679,780 to get 784,340