397449

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:141

約数の個数: 24

約数和(自身を含む): 640640

約数和(自身を除く): 243191

約数列:

[1, 3, 9, 13, 39, 43, 79, 117, 129, 237, 387, 559, 711, 1027, 1677, 3081, 3397, 5031, 9243, 10191, 30573, 44161, 132483, 397449]

約数ペア:

[(1, 397449), (3, 132483), (9, 44161), (13, 30573), (39, 10191), (43, 9243), (79, 5031), (117, 3397), (129, 3081), (237, 1677), (387, 1027), (559, 711)]