The factors of the number 6,344,400 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 25, 30, 34, 40, 48, 50, 51, 60, 68, 75, 80, 85, 100, 102, 120, 136, 150, 170, 200, 204, 240, 255, 272, 300, 311, 340, 400, 408, 425, 510, 600, 622, 680, 816, 850, 933, 1020, 1200, 1244, 1275, 1360, 1555, 1700, 1866, 2040, 2488, 2550, 3110, 3400, 3732, 4080, 4665, 4976, 5100, 5287, 6220, 6800, 7464, 7775, 9330, 10200, 10574, 12440, 14928, 15550, 15861, 18660, 20400, 21148, 23325, 24880, 26435, 31100, 31722, 37320, 42296, 46650, 52870, 62200, 63444, 74640, 79305, 84592, 93300, 105740, 124400, 126888, 132175, 158610, 186600, 211480, 253776, 264350, 317220, 373200, 396525, 422960, 528700, 634440, 793050, 1057400, 1268880, 1586100, 2114800, 3172200, 6344400.
If you add them up, you will get the total of 21,587,904.