20781120

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{21647}}^1$

素因数の和:21667

約数の個数: 56

約数和(自身を含む): 65983104

約数和(自身を除く): 45201984

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 160, 192, 240, 320, 480, 960, 21647, 43294, 64941, 86588, 108235, 129882, 173176, 216470, 259764, 324705, 346352, 432940, 519528, 649410, 692704, 865880, 1039056, 1298820, 1385408, 1731760, 2078112, 2597640, 3463520, 4156224, 5195280, 6927040, 10390560, 20781120]

約数ペア:

[(1, 20781120), (2, 10390560), (3, 6927040), (4, 5195280), (5, 4156224), (6, 3463520), (8, 2597640), (10, 2078112), (12, 1731760), (15, 1385408), (16, 1298820), (20, 1039056), (24, 865880), (30, 692704), (32, 649410), (40, 519528), (48, 432940), (60, 346352), (64, 324705), (80, 259764), (96, 216470), (120, 173176), (160, 129882), (192, 108235), (240, 86588), (320, 64941), (480, 43294), (960, 21647)]