The factors of the number 891,000 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 25, 27, 30, 33, 36, 40, 44, 45, 50, 54, 55, 60, 66, 72, 75, 81, 88, 90, 99, 100, 108, 110, 120, 125, 132, 135, 150, 162, 165, 180, 198, 200, 216, 220, 225, 250, 264, 270, 275, 297, 300, 324, 330, 360, 375, 396, 405, 440, 450, 495, 500, 540, 550, 594, 600, 648, 660, 675, 750, 792, 810, 825, 891, 900, 990, 1000, 1080, 1100, 1125, 1188, 1320, 1350, 1375, 1485, 1500, 1620, 1650, 1782, 1800, 1980, 2025, 2200, 2250, 2376, 2475, 2700, 2750, 2970, 3000, 3240, 3300, 3375, 3564, 3960, 4050, 4125, 4455, 4500, 4950, 5400, 5500, 5940, 6600, 6750, 7128, 7425, 8100, 8250, 8910, 9000, 9900, 10125, 11000, 11880, 12375, 13500, 14850, 16200, 16500, 17820, 19800, 20250, 22275, 24750, 27000, 29700, 33000, 35640, 37125, 40500, 44550, 49500, 59400, 74250, 81000, 89100, 99000, 111375, 148500, 178200, 222750, 297000, 445500, 891000.
If you add them up, you will get the total of 3,397,680.