19856540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2099}}^1$

素因数の和:2162

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 26713060

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 55, 86, 110, 172, 215, 220, 430, 473, 860, 946, 1892, 2099, 2365, 4198, 4730, 8396, 9460, 10495, 20990, 23089, 41980, 46178, 90257, 92356, 115445, 180514, 230890, 361028, 451285, 461780, 902570, 992827, 1805140, 1985654, 3971308, 4964135, 9928270, 19856540]

約数ペア:

[(1, 19856540), (2, 9928270), (4, 4964135), (5, 3971308), (10, 1985654), (11, 1805140), (20, 992827), (22, 902570), (43, 461780), (44, 451285), (55, 361028), (86, 230890), (110, 180514), (172, 115445), (215, 92356), (220, 90257), (430, 46178), (473, 41980), (860, 23089), (946, 20990), (1892, 10495), (2099, 9460), (2365, 8396), (4198, 4730)]