21052437

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2777}}^1$

素因数の和:2825

約数の個数: 24

約数和(自身を含む): 33869376

約数和(自身を除く): 12816939

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 2777, 7581, 8331, 19439, 52763, 58317, 158289, 369341, 1002497, 1108023, 3007491, 7017479, 21052437]

約数ペア:

[(1, 21052437), (3, 7017479), (7, 3007491), (19, 1108023), (21, 1002497), (57, 369341), (133, 158289), (361, 58317), (399, 52763), (1083, 19439), (2527, 8331), (2777, 7581)]