The factors of the number 3,491,400 are: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 23, 24, 25, 30, 33, 40, 44, 46, 50, 55, 60, 66, 69, 75, 88, 92, 100, 110, 115, 120, 132, 138, 150, 165, 184, 200, 220, 230, 253, 264, 275, 276, 300, 330, 345, 440, 460, 506, 529, 550, 552, 575, 600, 660, 690, 759, 825, 920, 1012, 1058, 1100, 1150, 1265, 1320, 1380, 1518, 1587, 1650, 1725, 2024, 2116, 2200, 2300, 2530, 2645, 2760, 3036, 3174, 3300, 3450, 3795, 4232, 4600, 5060, 5290, 5819, 6072, 6325, 6348, 6600, 6900, 7590, 7935, 10120, 10580, 11638, 12650, 12696, 13225, 13800, 15180, 15870, 17457, 18975, 21160, 23276, 25300, 26450, 29095, 30360, 31740, 34914, 37950, 39675, 46552, 50600, 52900, 58190, 63480, 69828, 75900, 79350, 87285, 105800, 116380, 139656, 145475, 151800, 158700, 174570, 232760, 290950, 317400, 349140, 436425, 581900, 698280, 872850, 1163800, 1745700, 3491400.
If you add them up, you will get the total of 12,342,960.