Q: What is the sum of all factors of the number 402,640 excluding 402,640?
A: 668,720
The factors of the number 402,640 are: 1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 719, 1438, 2876, 3595, 5033, 5752, 7190, 10066, 11504, 14380, 20132, 25165, 28760, 40264, 50330, 57520, 80528, 100660, 201320, 402640.
If you add them up, you will get the total of 403,308. Now subtract 402,640 to get 668,720