21257444

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{13187}}^1$

素因数の和:13235

約数の個数: 24

約数和(自身を含む): 41357568

約数和(自身を除く): 20100124

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 124, 403, 806, 1612, 13187, 26374, 52748, 171431, 342862, 408797, 685724, 817594, 1635188, 5314361, 10628722, 21257444]

約数ペア:

[(1, 21257444), (2, 10628722), (4, 5314361), (13, 1635188), (26, 817594), (31, 685724), (52, 408797), (62, 342862), (124, 171431), (403, 52748), (806, 26374), (1612, 13187)]