Q: What is the sum of all factors of the number 9,840 excluding 9,840?
A: 21,408
The factors of the number 9,840 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 41, 48, 60, 80, 82, 120, 123, 164, 205, 240, 246, 328, 410, 492, 615, 656, 820, 984, 1230, 1640, 1968, 2460, 3280, 4920, 9840.
If you add them up, you will get the total of 9,861. Now subtract 9,840 to get 21,408