The factors of the number 5,515,320 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 41, 57, 59, 60, 76, 82, 95, 114, 118, 120, 123, 152, 164, 177, 190, 205, 228, 236, 246, 285, 295, 328, 354, 380, 410, 456, 472, 492, 570, 590, 615, 708, 760, 779, 820, 885, 984, 1121, 1140, 1180, 1230, 1416, 1558, 1640, 1770, 2242, 2280, 2337, 2360, 2419, 2460, 3116, 3363, 3540, 3895, 4484, 4674, 4838, 4920, 5605, 6232, 6726, 7080, 7257, 7790, 8968, 9348, 9676, 11210, 11685, 12095, 13452, 14514, 15580, 16815, 18696, 19352, 22420, 23370, 24190, 26904, 29028, 31160, 33630, 36285, 44840, 45961, 46740, 48380, 58056, 67260, 72570, 91922, 93480, 96760, 134520, 137883, 145140, 183844, 229805, 275766, 290280, 367688, 459610, 551532, 689415, 919220, 1103064, 1378830, 1838440, 2757660, 5515320.
If you add them up, you will get the total of 18,144,000.