The factors of the number 3,649,968 are: 1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 17, 18, 21, 24, 27, 28, 34, 36, 42, 48, 51, 54, 56, 63, 68, 71, 72, 84, 102, 108, 112, 119, 126, 136, 142, 144, 153, 168, 189, 204, 213, 216, 238, 252, 272, 284, 306, 336, 357, 378, 408, 426, 432, 459, 476, 497, 504, 568, 612, 639, 714, 756, 816, 852, 918, 952, 994, 1008, 1071, 1136, 1207, 1224, 1278, 1428, 1491, 1512, 1704, 1836, 1904, 1917, 1988, 2142, 2414, 2448, 2556, 2856, 2982, 3024, 3213, 3408, 3621, 3672, 3834, 3976, 4284, 4473, 4828, 5112, 5712, 5964, 6426, 7242, 7344, 7668, 7952, 8449, 8568, 8946, 9656, 10224, 10863, 11928, 12852, 13419, 14484, 15336, 16898, 17136, 17892, 19312, 21726, 23856, 25347, 25704, 26838, 28968, 30672, 32589, 33796, 35784, 43452, 50694, 51408, 53676, 57936, 65178, 67592, 71568, 76041, 86904, 101388, 107352, 130356, 135184, 152082, 173808, 202776, 214704, 228123, 260712, 304164, 405552, 456246, 521424, 608328, 912492, 1216656, 1824984, 3649968.
If you add them up, you will get the total of 12,856,320.