18745180

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10531}}^1$

素因数の和:10629

約数の個数: 24

約数和(自身を含む): 39810960

約数和(自身を除く): 21065780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10531, 21062, 42124, 52655, 105310, 210620, 937259, 1874518, 3749036, 4686295, 9372590, 18745180]

約数ペア:

[(1, 18745180), (2, 9372590), (4, 4686295), (5, 3749036), (10, 1874518), (20, 937259), (89, 210620), (178, 105310), (356, 52655), (445, 42124), (890, 21062), (1780, 10531)]