18987980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5077}}^1$

素因数の和:5114

約数の個数: 48

約数和(自身を含む): 46067616

約数和(自身を除く): 27079636

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 5077, 10154, 20308, 25385, 50770, 55847, 86309, 101540, 111694, 172618, 223388, 279235, 345236, 431545, 558470, 863090, 949399, 1116940, 1726180, 1898798, 3797596, 4746995, 9493990, 18987980]

約数ペア:

[(1, 18987980), (2, 9493990), (4, 4746995), (5, 3797596), (10, 1898798), (11, 1726180), (17, 1116940), (20, 949399), (22, 863090), (34, 558470), (44, 431545), (55, 345236), (68, 279235), (85, 223388), (110, 172618), (170, 111694), (187, 101540), (220, 86309), (340, 55847), (374, 50770), (748, 25385), (935, 20308), (1870, 10154), (3740, 5077)]