20677120

素因数分解:

$2^9\times 5^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:261

約数の個数: 80

約数和(自身を含む): 51043608

約数和(自身を除く): 30366488

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 197, 205, 256, 320, 328, 394, 410, 512, 640, 656, 788, 820, 985, 1280, 1312, 1576, 1640, 1970, 2560, 2624, 3152, 3280, 3940, 5248, 6304, 6560, 7880, 8077, 10496, 12608, 13120, 15760, 16154, 20992, 25216, 26240, 31520, 32308, 40385, 50432, 52480, 63040, 64616, 80770, 100864, 104960, 126080, 129232, 161540, 252160, 258464, 323080, 504320, 516928, 646160, 1033856, 1292320, 2067712, 2584640, 4135424, 5169280, 10338560, 20677120]

約数ペア:

[(1, 20677120), (2, 10338560), (4, 5169280), (5, 4135424), (8, 2584640), (10, 2067712), (16, 1292320), (20, 1033856), (32, 646160), (40, 516928), (41, 504320), (64, 323080), (80, 258464), (82, 252160), (128, 161540), (160, 129232), (164, 126080), (197, 104960), (205, 100864), (256, 80770), (320, 64616), (328, 63040), (394, 52480), (410, 50432), (512, 40385), (640, 32308), (656, 31520), (788, 26240), (820, 25216), (985, 20992), (1280, 16154), (1312, 15760), (1576, 13120), (1640, 12608), (1970, 10496), (2560, 8077), (2624, 7880), (3152, 6560), (3280, 6304), (3940, 5248)]