259996009

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{431}}^1\times {\mathrm{947}}^1$

素因数の和:1405

約数の個数: 24

約数和(自身を含む): 326809728

約数和(自身を除く): 66813719

約数列:

[1, 7, 13, 49, 91, 431, 637, 947, 3017, 5603, 6629, 12311, 21119, 39221, 46403, 86177, 274547, 408157, 603239, 2857099, 5306041, 19999693, 37142287, 259996009]

約数ペア:

[(1, 259996009), (7, 37142287), (13, 19999693), (49, 5306041), (91, 2857099), (431, 603239), (637, 408157), (947, 274547), (3017, 86177), (5603, 46403), (6629, 39221), (12311, 21119)]