18693820

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21737}}^1$

素因数の和:21789

約数の個数: 24

約数和(自身を含む): 40171824

約数和(自身を除く): 21478004

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21737, 43474, 86948, 108685, 217370, 434740, 934691, 1869382, 3738764, 4673455, 9346910, 18693820]

約数ペア:

[(1, 18693820), (2, 9346910), (4, 4673455), (5, 3738764), (10, 1869382), (20, 934691), (43, 434740), (86, 217370), (172, 108685), (215, 86948), (430, 43474), (860, 21737)]