21509972

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{3517}}^1$

素因数の和:3671

約数の個数: 24

約数和(自身を含む): 41371680

約数和(自身を除く): 19861708

約数列:

[1, 2, 4, 11, 22, 44, 139, 278, 556, 1529, 3058, 3517, 6116, 7034, 14068, 38687, 77374, 154748, 488863, 977726, 1955452, 5377493, 10754986, 21509972]

約数ペア:

[(1, 21509972), (2, 10754986), (4, 5377493), (11, 1955452), (22, 977726), (44, 488863), (139, 154748), (278, 77374), (556, 38687), (1529, 14068), (3058, 7034), (3517, 6116)]