21131605

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{9371}}^1$

素因数の和:9428

約数の個数: 16

約数和(自身を含む): 28340928

約数和(自身を除く): 7209323

約数列:

[1, 5, 11, 41, 55, 205, 451, 2255, 9371, 46855, 103081, 384211, 515405, 1921055, 4226321, 21131605]

約数ペア:

[(1, 21131605), (5, 4226321), (11, 1921055), (41, 515405), (55, 384211), (205, 103081), (451, 46855), (2255, 9371)]