21038479

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{1373}}^1$

素因数の和:1590

約数の個数: 16

約数和(自身を含む): 26380800

約数和(自身を除く): 5342321

約数列:

[1, 7, 11, 77, 199, 1373, 1393, 2189, 9611, 15103, 15323, 105721, 273227, 1912589, 3005497, 21038479]

約数ペア:

[(1, 21038479), (7, 3005497), (11, 1912589), (77, 273227), (199, 105721), (1373, 15323), (1393, 15103), (2189, 9611)]