Q: What is the sum of all factors of the number 77,640 excluding 77,640?
A: 155,640
The factors of the number 77,640 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 647, 1294, 1941, 2588, 3235, 3882, 5176, 6470, 7764, 9705, 12940, 15528, 19410, 25880, 38820, 77640.
If you add them up, you will get the total of 77,795. Now subtract 77,640 to get 155,640