Q: What is the sum of all factors of the number 311,200,100 excluding 311,200,100?

Why is 387,380,188 the sum of all factors of 311,200,100, excluding 311,200,100?

The factors of the number 311,200,100 are: 1, 2, 4, 5, 10, 20, 25, 50, 53, 71, 100, 106, 142, 212, 265, 284, 355, 530, 710, 827, 1060, 1325, 1420, 1654, 1775, 2650, 3308, 3550, 3763, 4135, 5300, 7100, 7526, 8270, 15052, 16540, 18815, 20675, 37630, 41350, 43831, 58717, 75260, 82700, 87662, 94075, 117434, 175324, 188150, 219155, 234868, 293585, 376300, 438310, 587170, 876620, 1095775, 1174340, 1467925, 2191550, 2935850, 3112001, 4383100, 5871700, 6224002, 12448004, 15560005, 31120010, 62240020, 77800025, 155600050, 311200100.

If you add them up, you will get the total of 311,200,487. Now subtract 311,200,100 to get 387,380,188

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