The factors of the number 858,000 are: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 16, 20, 22, 24, 25, 26, 30, 33, 39, 40, 44, 48, 50, 52, 55, 60, 65, 66, 75, 78, 80, 88, 100, 104, 110, 120, 125, 130, 132, 143, 150, 156, 165, 176, 195, 200, 208, 220, 240, 250, 260, 264, 275, 286, 300, 312, 325, 330, 375, 390, 400, 429, 440, 500, 520, 528, 550, 572, 600, 624, 650, 660, 715, 750, 780, 825, 858, 880, 975, 1000, 1040, 1100, 1144, 1200, 1300, 1320, 1375, 1430, 1500, 1560, 1625, 1650, 1716, 1950, 2000, 2145, 2200, 2288, 2600, 2640, 2750, 2860, 3000, 3120, 3250, 3300, 3432, 3575, 3900, 4125, 4290, 4400, 4875, 5200, 5500, 5720, 6000, 6500, 6600, 6864, 7150, 7800, 8250, 8580, 9750, 10725, 11000, 11440, 13000, 13200, 14300, 15600, 16500, 17160, 17875, 19500, 21450, 22000, 26000, 28600, 33000, 34320, 35750, 39000, 42900, 53625, 57200, 66000, 71500, 78000, 85800, 107250, 143000, 171600, 214500, 286000, 429000, 858000.
If you add them up, you will get the total of 3,249,792.