The factors of the number 1,424,640 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 53, 56, 60, 64, 70, 80, 84, 96, 105, 106, 112, 120, 128, 140, 159, 160, 168, 192, 210, 212, 224, 240, 256, 265, 280, 318, 320, 336, 371, 384, 420, 424, 448, 480, 530, 560, 636, 640, 672, 742, 768, 795, 840, 848, 896, 960, 1060, 1113, 1120, 1272, 1280, 1344, 1484, 1590, 1680, 1696, 1792, 1855, 1920, 2120, 2226, 2240, 2544, 2688, 2968, 3180, 3360, 3392, 3710, 3840, 4240, 4452, 4480, 5088, 5376, 5565, 5936, 6360, 6720, 6784, 7420, 8480, 8904, 8960, 10176, 11130, 11872, 12720, 13440, 13568, 14840, 16960, 17808, 20352, 22260, 23744, 25440, 26880, 29680, 33920, 35616, 40704, 44520, 47488, 50880, 59360, 67840, 71232, 89040, 94976, 101760, 118720, 142464, 178080, 203520, 237440, 284928, 356160, 474880, 712320, 1424640.
If you add them up, you will get the total of 1,424,643. Now subtract 1,424,640 to get 3,873,408