21080836

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{17509}}^1$

素因数の和:17563

約数の個数: 24

約数和(自身を含む): 43144640

約数和(自身を除く): 22063804

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 172, 301, 602, 1204, 17509, 35018, 70036, 122563, 245126, 490252, 752887, 1505774, 3011548, 5270209, 10540418, 21080836]

約数ペア:

[(1, 21080836), (2, 10540418), (4, 5270209), (7, 3011548), (14, 1505774), (28, 752887), (43, 490252), (86, 245126), (172, 122563), (301, 70036), (602, 35018), (1204, 17509)]