The factors of the number 996,336 are: 1, 2, 3, 4, 6, 8, 9, 11, 12, 16, 17, 18, 22, 24, 33, 34, 36, 37, 44, 48, 51, 66, 68, 72, 74, 88, 99, 102, 111, 132, 136, 144, 148, 153, 176, 187, 198, 204, 222, 264, 272, 296, 306, 333, 374, 396, 407, 408, 444, 528, 561, 592, 612, 629, 666, 748, 792, 814, 816, 888, 1122, 1221, 1224, 1258, 1332, 1496, 1584, 1628, 1683, 1776, 1887, 2244, 2442, 2448, 2516, 2664, 2992, 3256, 3366, 3663, 3774, 4488, 4884, 5032, 5328, 5661, 6512, 6732, 6919, 7326, 7548, 8976, 9768, 10064, 11322, 13464, 13838, 14652, 15096, 19536, 20757, 22644, 26928, 27676, 29304, 30192, 41514, 45288, 55352, 58608, 62271, 83028, 90576, 110704, 124542, 166056, 249084, 332112, 498168, 996336.
If you add them up, you will get the total of 3,307,824.