The factors of the number 1,489,600 are: 1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 25, 28, 32, 35, 38, 40, 49, 50, 56, 64, 70, 76, 80, 95, 98, 100, 112, 133, 140, 152, 160, 175, 190, 196, 200, 224, 245, 266, 280, 304, 320, 350, 380, 392, 400, 448, 475, 490, 532, 560, 608, 665, 700, 760, 784, 800, 931, 950, 980, 1064, 1120, 1216, 1225, 1330, 1400, 1520, 1568, 1600, 1862, 1900, 1960, 2128, 2240, 2450, 2660, 2800, 3040, 3136, 3325, 3724, 3800, 3920, 4256, 4655, 4900, 5320, 5600, 6080, 6650, 7448, 7600, 7840, 8512, 9310, 9800, 10640, 11200, 13300, 14896, 15200, 15680, 18620, 19600, 21280, 23275, 26600, 29792, 30400, 37240, 39200, 42560, 46550, 53200, 59584, 74480, 78400, 93100, 106400, 148960, 186200, 212800, 297920, 372400, 744800, 1489600.
If you add them up, you will get the total of 4,488,180.