18620660

素因数分解:

$2^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1439}}^1$

素因数の和:2095

約数の個数: 24

約数和(自身を含む): 39191040

約数和(自身を除く): 20570380

約数列:

[1, 2, 4, 5, 10, 20, 647, 1294, 1439, 2588, 2878, 3235, 5756, 6470, 7195, 12940, 14390, 28780, 931033, 1862066, 3724132, 4655165, 9310330, 18620660]

約数ペア:

[(1, 18620660), (2, 9310330), (4, 4655165), (5, 3724132), (10, 1862066), (20, 931033), (647, 28780), (1294, 14390), (1439, 12940), (2588, 7195), (2878, 6470), (3235, 5756)]