21197449

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{311}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 26889408

約数和(自身を除く): 5691959

約数列:

[1, 7, 13, 49, 91, 107, 311, 637, 749, 1391, 2177, 4043, 5243, 9737, 15239, 28301, 33277, 68159, 198107, 232939, 432601, 1630573, 3028207, 21197449]

約数ペア:

[(1, 21197449), (7, 3028207), (13, 1630573), (49, 432601), (91, 232939), (107, 198107), (311, 68159), (637, 33277), (749, 28301), (1391, 15239), (2177, 9737), (4043, 5243)]