18912260

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21991}}^1$

素因数の和:22043

約数の個数: 24

約数和(自身を含む): 40641216

約数和(自身を除く): 21728956

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21991, 43982, 87964, 109955, 219910, 439820, 945613, 1891226, 3782452, 4728065, 9456130, 18912260]

約数ペア:

[(1, 18912260), (2, 9456130), (4, 4728065), (5, 3782452), (10, 1891226), (20, 945613), (43, 439820), (86, 219910), (172, 109955), (215, 87964), (430, 43982), (860, 21991)]