21042609

素因数分解:

$3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{3329}}^1$

素因数の和:3389

約数の個数: 24

約数和(自身を含む): 33406560

約数和(自身を除く): 12363951

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 903, 2107, 3329, 6321, 9987, 23303, 69909, 143147, 163121, 429441, 489363, 1002029, 3006087, 7014203, 21042609]

約数ペア:

[(1, 21042609), (3, 7014203), (7, 3006087), (21, 1002029), (43, 489363), (49, 429441), (129, 163121), (147, 143147), (301, 69909), (903, 23303), (2107, 9987), (3329, 6321)]