Q: What is the sum of all factors of the number 381,640 excluding 381,640?

A: 655,160

Why is 655,160 the sum of all factors of 381,640, excluding 381,640?

The factors of the number 381,640 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 47, 56, 58, 70, 94, 116, 140, 145, 188, 203, 232, 235, 280, 290, 329, 376, 406, 470, 580, 658, 812, 940, 1015, 1160, 1316, 1363, 1624, 1645, 1880, 2030, 2632, 2726, 3290, 4060, 5452, 6580, 6815, 8120, 9541, 10904, 13160, 13630, 19082, 27260, 38164, 47705, 54520, 76328, 95410, 190820, 381640.

If you add them up, you will get the total of 382,295. Now subtract 381,640 to get 655,160