18919021

素因数分解:

${\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{509}}^1$

素因数の和:660

約数の個数: 16

約数和(自身を含む): 21542400

約数和(自身を除く): 2623379

約数列:

[1, 11, 31, 109, 341, 509, 1199, 3379, 5599, 15779, 37169, 55481, 173569, 610291, 1719911, 18919021]

約数ペア:

[(1, 18919021), (11, 1719911), (31, 610291), (109, 173569), (341, 55481), (509, 37169), (1199, 15779), (3379, 5599)]