21728668

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{32143}}^1$

素因数の和:32173

約数の個数: 18

約数和(自身を含む): 41176464

約数和(自身を除く): 19447796

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 32143, 64286, 128572, 417859, 835718, 1671436, 5432167, 10864334, 21728668]

約数ペア:

[(1, 21728668), (2, 10864334), (4, 5432167), (13, 1671436), (26, 835718), (52, 417859), (169, 128572), (338, 64286), (676, 32143)]