18864321

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47279}}^1$

素因数の和:47308

約数の個数: 16

約数和(自身を含む): 30259200

約数和(自身を除く): 11394879

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 47279, 141837, 330953, 898301, 992859, 2694903, 6288107, 18864321]

約数ペア:

[(1, 18864321), (3, 6288107), (7, 2694903), (19, 992859), (21, 898301), (57, 330953), (133, 141837), (399, 47279)]