The factors of the number 2,556,120 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 51, 56, 60, 68, 70, 84, 85, 102, 105, 119, 120, 136, 140, 168, 170, 179, 204, 210, 238, 255, 280, 340, 357, 358, 408, 420, 476, 510, 537, 595, 680, 714, 716, 840, 895, 952, 1020, 1074, 1190, 1253, 1428, 1432, 1785, 1790, 2040, 2148, 2380, 2506, 2685, 2856, 3043, 3570, 3580, 3759, 4296, 4760, 5012, 5370, 6086, 6265, 7140, 7160, 7518, 9129, 10024, 10740, 12172, 12530, 14280, 15036, 15215, 18258, 18795, 21301, 21480, 24344, 25060, 30072, 30430, 36516, 37590, 42602, 45645, 50120, 60860, 63903, 73032, 75180, 85204, 91290, 106505, 121720, 127806, 150360, 170408, 182580, 213010, 255612, 319515, 365160, 426020, 511224, 639030, 852040, 1278060, 2556120.
If you add them up, you will get the total of 9,331,200.