Q: What is the sum of all factors of the number 521,280 excluding 521,280?

Why is 1,281,612 the sum of all factors of 521,280, excluding 521,280?

The factors of the number 521,280 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 64, 72, 80, 90, 96, 120, 144, 160, 180, 181, 192, 240, 288, 320, 360, 362, 480, 543, 576, 720, 724, 905, 960, 1086, 1440, 1448, 1629, 1810, 2172, 2715, 2880, 2896, 3258, 3620, 4344, 5430, 5792, 6516, 7240, 8145, 8688, 10860, 11584, 13032, 14480, 16290, 17376, 21720, 26064, 28960, 32580, 34752, 43440, 52128, 57920, 65160, 86880, 104256, 130320, 173760, 260640, 521280.

If you add them up, you will get the total of 521,281. Now subtract 521,280 to get 1,281,612

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