Q: What is the sum of all factors of the number 1,581,640 excluding 1,581,640?
A: 1,977,140
The factors of the number 1,581,640 are: 1, 2, 4, 5, 8, 10, 20, 40, 39541, 79082, 158164, 197705, 316328, 395410, 790820, 1581640.
If you add them up, you will get the total of 1,581,641. Now subtract 1,581,640 to get 1,977,140