The factors of the number 5,071,440 are: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 17, 20, 22, 24, 30, 33, 34, 40, 44, 48, 51, 55, 60, 66, 68, 80, 85, 88, 102, 110, 113, 120, 132, 136, 165, 170, 176, 187, 204, 220, 226, 240, 255, 264, 272, 330, 339, 340, 374, 408, 440, 452, 510, 528, 561, 565, 660, 678, 680, 748, 816, 880, 904, 935, 1020, 1122, 1130, 1243, 1320, 1356, 1360, 1496, 1695, 1808, 1870, 1921, 2040, 2244, 2260, 2486, 2640, 2712, 2805, 2992, 3390, 3729, 3740, 3842, 4080, 4488, 4520, 4972, 5424, 5610, 5763, 6215, 6780, 7458, 7480, 7684, 8976, 9040, 9605, 9944, 11220, 11526, 12430, 13560, 14916, 14960, 15368, 18645, 19210, 19888, 21131, 22440, 23052, 24860, 27120, 28815, 29832, 30736, 37290, 38420, 42262, 44880, 46104, 49720, 57630, 59664, 63393, 74580, 76840, 84524, 92208, 99440, 105655, 115260, 126786, 149160, 153680, 169048, 211310, 230520, 253572, 298320, 316965, 338096, 422620, 461040, 507144, 633930, 845240, 1014288, 1267860, 1690480, 2535720, 5071440.
If you add them up, you will get the total of 18,320,256.