66457279

素因数分解:

$7^4\times {\mathrm{89}}^1\times {\mathrm{311}}^1$

素因数の和:428

約数の個数: 20

約数和(自身を含む): 78652080

約数和(自身を除く): 12194801

約数列:

[1, 7, 49, 89, 311, 343, 623, 2177, 2401, 4361, 15239, 27679, 30527, 106673, 193753, 213689, 746711, 1356271, 9493897, 66457279]

約数ペア:

[(1, 66457279), (7, 9493897), (49, 1356271), (89, 746711), (311, 213689), (343, 193753), (623, 106673), (2177, 30527), (2401, 27679), (4361, 15239)]