Q: What is the sum of all factors of the number 398,780 excluding 398,780?
A: 450,628
The factors of the number 398,780 are: 1, 2, 4, 5, 10, 20, 127, 157, 254, 314, 508, 628, 635, 785, 1270, 1570, 2540, 3140, 19939, 39878, 79756, 99695, 199390, 398780.
If you add them up, you will get the total of 399,230. Now subtract 398,780 to get 450,628