The factors of the number 1,223,040 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 32, 35, 39, 40, 42, 48, 49, 52, 56, 60, 64, 65, 70, 78, 80, 84, 91, 96, 98, 104, 105, 112, 120, 128, 130, 140, 147, 156, 160, 168, 182, 192, 195, 196, 208, 210, 224, 240, 245, 260, 273, 280, 294, 312, 320, 336, 364, 384, 390, 392, 416, 420, 448, 455, 480, 490, 520, 546, 560, 588, 624, 637, 640, 672, 728, 735, 780, 784, 832, 840, 896, 910, 960, 980, 1040, 1092, 1120, 1176, 1248, 1274, 1344, 1365, 1456, 1470, 1560, 1568, 1664, 1680, 1820, 1911, 1920, 1960, 2080, 2184, 2240, 2352, 2496, 2548, 2688, 2730, 2912, 2940, 3120, 3136, 3185, 3360, 3640, 3822, 3920, 4160, 4368, 4480, 4704, 4992, 5096, 5460, 5824, 5880, 6240, 6272, 6370, 6720, 7280, 7644, 7840, 8320, 8736, 9408, 9555, 10192, 10920, 11648, 11760, 12480, 12740, 13440, 14560, 15288, 15680, 17472, 18816, 19110, 20384, 21840, 23520, 24960, 25480, 29120, 30576, 31360, 34944, 38220, 40768, 43680, 47040, 50960, 58240, 61152, 76440, 81536, 87360, 94080, 101920, 122304, 152880, 174720, 203840, 244608, 305760, 407680, 611520, 1223040.
If you add them up, you will get the total of 4,883,760.