18891009

素因数分解:

$3^3\times {\mathrm{457}}^1\times {\mathrm{1531}}^1$

素因数の和:1997

約数の個数: 16

約数和(自身を含む): 28066240

約数和(自身を除く): 9175231

約数列:

[1, 3, 9, 27, 457, 1371, 1531, 4113, 4593, 12339, 13779, 41337, 699667, 2099001, 6297003, 18891009]

約数ペア:

[(1, 18891009), (3, 6297003), (9, 2099001), (27, 699667), (457, 41337), (1371, 13779), (1531, 12339), (4113, 4593)]