The factors of the number 1,243,440 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 99, 110, 120, 132, 144, 157, 165, 176, 180, 198, 220, 240, 264, 314, 330, 360, 396, 440, 471, 495, 528, 628, 660, 720, 785, 792, 880, 942, 990, 1256, 1320, 1413, 1570, 1584, 1727, 1884, 1980, 2355, 2512, 2640, 2826, 3140, 3454, 3768, 3960, 4710, 5181, 5652, 6280, 6908, 7065, 7536, 7920, 8635, 9420, 10362, 11304, 12560, 13816, 14130, 15543, 17270, 18840, 20724, 22608, 25905, 27632, 28260, 31086, 34540, 37680, 41448, 51810, 56520, 62172, 69080, 77715, 82896, 103620, 113040, 124344, 138160, 155430, 207240, 248688, 310860, 414480, 621720, 1243440.
If you add them up, you will get the total of 4,584,528.