The factors of the number 256,375,600 are: 1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 47, 50, 52, 65, 80, 94, 100, 104, 130, 188, 200, 208, 235, 260, 325, 376, 400, 470, 520, 611, 650, 752, 940, 1040, 1049, 1175, 1222, 1300, 1880, 2098, 2350, 2444, 2600, 3055, 3760, 4196, 4700, 4888, 5200, 5245, 6110, 8392, 9400, 9776, 10490, 12220, 13637, 15275, 16784, 18800, 20980, 24440, 26225, 27274, 30550, 41960, 48880, 49303, 52450, 54548, 61100, 68185, 83920, 98606, 104900, 109096, 122200, 136370, 197212, 209800, 218192, 244400, 246515, 272740, 340925, 394424, 419600, 493030, 545480, 640939, 681850, 788848, 986060, 1090960, 1232575, 1281878, 1363700, 1972120, 2465150, 2563756, 2727400, 3204695, 3944240, 4930300, 5127512, 5454800, 6409390, 9860600, 10255024, 12818780, 16023475, 19721200, 25637560, 32046950, 51275120, 64093900, 128187800, 256375600.
If you add them up, you will get the total of 256,376,021. Now subtract 256,375,600 to get 421,706,000