18385940

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{21379}}^1$

素因数の和:21431

約数の個数: 24

約数和(自身を含む): 39510240

約数和(自身を除く): 21124300

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 21379, 42758, 85516, 106895, 213790, 427580, 919297, 1838594, 3677188, 4596485, 9192970, 18385940]

約数ペア:

[(1, 18385940), (2, 9192970), (4, 4596485), (5, 3677188), (10, 1838594), (20, 919297), (43, 427580), (86, 213790), (172, 106895), (215, 85516), (430, 42758), (860, 21379)]