The factors of the number 256,036,400 are: 1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 38, 40, 50, 59, 76, 80, 95, 100, 118, 152, 190, 200, 236, 295, 304, 380, 400, 472, 475, 571, 590, 760, 944, 950, 1121, 1142, 1180, 1475, 1520, 1900, 2242, 2284, 2360, 2855, 2950, 3800, 4484, 4568, 4720, 5605, 5710, 5900, 7600, 8968, 9136, 10849, 11210, 11420, 11800, 14275, 17936, 21698, 22420, 22840, 23600, 28025, 28550, 33689, 43396, 44840, 45680, 54245, 56050, 57100, 67378, 86792, 89680, 108490, 112100, 114200, 134756, 168445, 173584, 216980, 224200, 228400, 269512, 271225, 336890, 433960, 448400, 539024, 542450, 640091, 673780, 842225, 867920, 1084900, 1280182, 1347560, 1684450, 2169800, 2560364, 2695120, 3200455, 3368900, 4339600, 5120728, 6400910, 6737800, 10241456, 12801820, 13475600, 16002275, 25603640, 32004550, 51207280, 64009100, 128018200, 256036400.
If you add them up, you will get the total of 659,630,400.