156668239

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{18919}}^1$

素因数の和:18959

約数の個数: 18

約数和(自身を含む): 197354520

約数和(自身を除く): 40686281

約数列:

[1, 7, 13, 49, 91, 169, 637, 1183, 8281, 18919, 132433, 245947, 927031, 1721629, 3197311, 12051403, 22381177, 156668239]

約数ペア:

[(1, 156668239), (7, 22381177), (13, 12051403), (49, 3197311), (91, 1721629), (169, 927031), (637, 245947), (1183, 132433), (8281, 18919)]