21220297

素因数分解:

$7^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1\times {\mathrm{317}}^1$

素因数の和:528

約数の個数: 16

約数和(自身を含む): 24849792

約数和(自身を除く): 3629495

約数列:

[1, 7, 73, 131, 317, 511, 917, 2219, 9563, 23141, 41527, 66941, 161987, 290689, 3031471, 21220297]

約数ペア:

[(1, 21220297), (7, 3031471), (73, 290689), (131, 161987), (317, 66941), (511, 41527), (917, 23141), (2219, 9563)]