21420364

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{17791}}^1$

素因数の和:17845

約数の個数: 24

約数和(自身を含む): 43839488

約数和(自身を除く): 22419124

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 172, 301, 602, 1204, 17791, 35582, 71164, 124537, 249074, 498148, 765013, 1530026, 3060052, 5355091, 10710182, 21420364]

約数ペア:

[(1, 21420364), (2, 10710182), (4, 5355091), (7, 3060052), (14, 1530026), (28, 765013), (43, 498148), (86, 249074), (172, 124537), (301, 71164), (602, 35582), (1204, 17791)]