The factors of the number 1,578,720 are: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 16, 20, 22, 23, 24, 26, 30, 32, 33, 39, 40, 44, 46, 48, 52, 55, 60, 65, 66, 69, 78, 80, 88, 92, 96, 104, 110, 115, 120, 130, 132, 138, 143, 156, 160, 165, 176, 184, 195, 208, 220, 230, 240, 253, 260, 264, 276, 286, 299, 312, 330, 345, 352, 368, 390, 416, 429, 440, 460, 480, 506, 520, 528, 552, 572, 598, 624, 660, 690, 715, 736, 759, 780, 858, 880, 897, 920, 1012, 1040, 1056, 1104, 1144, 1196, 1248, 1265, 1320, 1380, 1430, 1495, 1518, 1560, 1716, 1760, 1794, 1840, 2024, 2080, 2145, 2208, 2288, 2392, 2530, 2640, 2760, 2860, 2990, 3036, 3120, 3289, 3432, 3588, 3680, 3795, 4048, 4290, 4485, 4576, 4784, 5060, 5280, 5520, 5720, 5980, 6072, 6240, 6578, 6864, 7176, 7590, 8096, 8580, 8970, 9568, 9867, 10120, 11040, 11440, 11960, 12144, 13156, 13728, 14352, 15180, 16445, 17160, 17940, 19734, 20240, 22880, 23920, 24288, 26312, 28704, 30360, 32890, 34320, 35880, 39468, 40480, 47840, 49335, 52624, 60720, 65780, 68640, 71760, 78936, 98670, 105248, 121440, 131560, 143520, 157872, 197340, 263120, 315744, 394680, 526240, 789360, 1578720.
If you add them up, you will get the total of 1,578,724. Now subtract 1,578,720 to get 4,517,664