21305600

素因数分解:

$2^8\times 5^2\times {\mathrm{3329}}^1$

素因数の和:3355

約数の個数: 54

約数和(自身を含む): 52750530

約数和(自身を除く): 31444930

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 640, 800, 1280, 1600, 3200, 3329, 6400, 6658, 13316, 16645, 26632, 33290, 53264, 66580, 83225, 106528, 133160, 166450, 213056, 266320, 332900, 426112, 532640, 665800, 852224, 1065280, 1331600, 2130560, 2663200, 4261120, 5326400, 10652800, 21305600]

約数ペア:

[(1, 21305600), (2, 10652800), (4, 5326400), (5, 4261120), (8, 2663200), (10, 2130560), (16, 1331600), (20, 1065280), (25, 852224), (32, 665800), (40, 532640), (50, 426112), (64, 332900), (80, 266320), (100, 213056), (128, 166450), (160, 133160), (200, 106528), (256, 83225), (320, 66580), (400, 53264), (640, 33290), (800, 26632), (1280, 16645), (1600, 13316), (3200, 6658), (3329, 6400)]