The factors of the number 1,023,360 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 41, 48, 52, 60, 64, 65, 78, 80, 82, 96, 104, 120, 123, 128, 130, 156, 160, 164, 192, 195, 205, 208, 240, 246, 260, 312, 320, 328, 384, 390, 410, 416, 480, 492, 520, 533, 615, 624, 640, 656, 780, 820, 832, 960, 984, 1040, 1066, 1230, 1248, 1312, 1560, 1599, 1640, 1664, 1920, 1968, 2080, 2132, 2460, 2496, 2624, 2665, 3120, 3198, 3280, 3936, 4160, 4264, 4920, 4992, 5248, 5330, 6240, 6396, 6560, 7872, 7995, 8320, 8528, 9840, 10660, 12480, 12792, 13120, 15744, 15990, 17056, 19680, 21320, 24960, 25584, 26240, 31980, 34112, 39360, 42640, 51168, 63960, 68224, 78720, 85280, 102336, 127920, 170560, 204672, 255840, 341120, 511680, 1023360.
If you add them up, you will get the total of 3,598,560.