Q: What is the sum of all factors of the number 12,690 excluding 12,690?
A: 21,870
The factors of the number 12,690 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 47, 54, 90, 94, 135, 141, 235, 270, 282, 423, 470, 705, 846, 1269, 1410, 2115, 2538, 4230, 6345, 12690.
If you add them up, you will get the total of 12,711. Now subtract 12,690 to get 21,870