The factors of the number 510,720 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 19, 20, 21, 24, 28, 30, 32, 35, 38, 40, 42, 48, 56, 57, 60, 64, 70, 76, 80, 84, 95, 96, 105, 112, 114, 120, 128, 133, 140, 152, 160, 168, 190, 192, 210, 224, 228, 240, 256, 266, 280, 285, 304, 320, 336, 380, 384, 399, 420, 448, 456, 480, 532, 560, 570, 608, 640, 665, 672, 760, 768, 798, 840, 896, 912, 960, 1064, 1120, 1140, 1216, 1280, 1330, 1344, 1520, 1596, 1680, 1792, 1824, 1920, 1995, 2128, 2240, 2280, 2432, 2660, 2688, 3040, 3192, 3360, 3648, 3840, 3990, 4256, 4480, 4560, 4864, 5320, 5376, 6080, 6384, 6720, 7296, 7980, 8512, 8960, 9120, 10640, 12160, 12768, 13440, 14592, 15960, 17024, 18240, 21280, 24320, 25536, 26880, 31920, 34048, 36480, 42560, 51072, 63840, 72960, 85120, 102144, 127680, 170240, 255360, 510720.
If you add them up, you will get the total of 510,721. Now subtract 510,720 to get 1,451,520