19865140

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{23099}}^1$

素因数の和:23151

約数の個数: 24

約数和(自身を含む): 42688800

約数和(自身を除く): 22823660

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 23099, 46198, 92396, 115495, 230990, 461980, 993257, 1986514, 3973028, 4966285, 9932570, 19865140]

約数ペア:

[(1, 19865140), (2, 9932570), (4, 4966285), (5, 3973028), (10, 1986514), (20, 993257), (43, 461980), (86, 230990), (172, 115495), (215, 92396), (430, 46198), (860, 23099)]