The factors of the number 9,201,816 are: 1, 2, 3, 4, 6, 8, 9, 12, 13, 18, 24, 26, 27, 29, 36, 39, 52, 54, 58, 72, 78, 87, 104, 108, 113, 116, 117, 156, 174, 216, 226, 232, 234, 261, 312, 339, 348, 351, 377, 452, 468, 522, 678, 696, 702, 754, 783, 904, 936, 1017, 1044, 1131, 1356, 1404, 1469, 1508, 1566, 2034, 2088, 2262, 2712, 2808, 2938, 3016, 3051, 3132, 3277, 3393, 4068, 4407, 4524, 5876, 6102, 6264, 6554, 6786, 8136, 8814, 9048, 9831, 10179, 11752, 12204, 13108, 13221, 13572, 17628, 19662, 20358, 24408, 26216, 26442, 27144, 29493, 35256, 39324, 39663, 40716, 42601, 52884, 58986, 78648, 79326, 81432, 85202, 88479, 105768, 117972, 127803, 158652, 170404, 176958, 235944, 255606, 317304, 340808, 353916, 383409, 511212, 707832, 766818, 1022424, 1150227, 1533636, 2300454, 3067272, 4600908, 9201816.
If you add them up, you will get the total of 28,728,000.