21722239

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{211}}^1$

素因数の和:427

約数の個数: 24

約数和(自身を含む): 27841536

約数和(自身を除く): 6119297

約数列:

[1, 7, 11, 49, 77, 191, 211, 539, 1337, 1477, 2101, 2321, 9359, 10339, 14707, 16247, 40301, 102949, 113729, 282107, 443311, 1974749, 3103177, 21722239]

約数ペア:

[(1, 21722239), (7, 3103177), (11, 1974749), (49, 443311), (77, 282107), (191, 113729), (211, 102949), (539, 40301), (1337, 16247), (1477, 14707), (2101, 10339), (2321, 9359)]