The factors of the number 909,216 are: 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 14, 16, 18, 21, 22, 24, 28, 32, 33, 36, 41, 42, 44, 48, 56, 63, 66, 72, 77, 82, 84, 88, 96, 99, 112, 123, 126, 132, 144, 154, 164, 168, 176, 198, 224, 231, 246, 252, 264, 287, 288, 308, 328, 336, 352, 369, 396, 451, 462, 492, 504, 528, 574, 616, 656, 672, 693, 738, 792, 861, 902, 924, 984, 1008, 1056, 1148, 1232, 1312, 1353, 1386, 1476, 1584, 1722, 1804, 1848, 1968, 2016, 2296, 2464, 2583, 2706, 2772, 2952, 3157, 3168, 3444, 3608, 3696, 3936, 4059, 4592, 5166, 5412, 5544, 5904, 6314, 6888, 7216, 7392, 8118, 9184, 9471, 10332, 10824, 11088, 11808, 12628, 13776, 14432, 16236, 18942, 20664, 21648, 22176, 25256, 27552, 28413, 32472, 37884, 41328, 43296, 50512, 56826, 64944, 75768, 82656, 101024, 113652, 129888, 151536, 227304, 303072, 454608, 909216.
If you add them up, you will get the total of 3,302,208.