21271778

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{311}}^1\times {\mathrm{3109}}^1$

素因数の和:3433

約数の個数: 16

約数和(自身を含む): 34931520

約数和(自身を除く): 13659742

約数列:

[1, 2, 11, 22, 311, 622, 3109, 3421, 6218, 6842, 34199, 68398, 966899, 1933798, 10635889, 21271778]

約数ペア:

[(1, 21271778), (2, 10635889), (11, 1933798), (22, 966899), (311, 68398), (622, 34199), (3109, 6842), (3421, 6218)]