Q: What is the sum of all factors of the number 61,421,440 excluding 61,421,440?

Why is 85,415,720 the sum of all factors of 61,421,440, excluding 61,421,440?

The factors of the number 61,421,440 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 95971, 191942, 383884, 479855, 767768, 959710, 1535536, 1919420, 3071072, 3838840, 6142144, 7677680, 12284288, 15355360, 30710720, 61421440.

If you add them up, you will get the total of 61,421,525. Now subtract 61,421,440 to get 85,415,720

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