20931640

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14143}}^1$

素因数の和:14191

約数の個数: 32

約数和(自身を含む): 48372480

約数和(自身を除く): 27440840

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14143, 28286, 56572, 70715, 113144, 141430, 282860, 523291, 565720, 1046582, 2093164, 2616455, 4186328, 5232910, 10465820, 20931640]

約数ペア:

[(1, 20931640), (2, 10465820), (4, 5232910), (5, 4186328), (8, 2616455), (10, 2093164), (20, 1046582), (37, 565720), (40, 523291), (74, 282860), (148, 141430), (185, 113144), (296, 70715), (370, 56572), (740, 28286), (1480, 14143)]