Q: What is the sum of all factors of the number 387,780 excluding 387,780?

A: 749,244

Why is 749,244 the sum of all factors of 387,780, excluding 387,780?

The factors of the number 387,780 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 281, 345, 460, 562, 690, 843, 1124, 1380, 1405, 1686, 2810, 3372, 4215, 5620, 6463, 8430, 12926, 16860, 19389, 25852, 32315, 38778, 64630, 77556, 96945, 129260, 193890, 387780.

If you add them up, you will get the total of 388,529. Now subtract 387,780 to get 749,244