20558881

素因数分解:

$7^2\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:253

約数の個数: 24

約数和(自身を含む): 24952320

約数和(自身を除く): 4393439

約数列:

[1, 7, 47, 49, 79, 113, 329, 553, 791, 2303, 3713, 3871, 5311, 5537, 8927, 25991, 37177, 62489, 181937, 260239, 419569, 437423, 2936983, 20558881]

約数ペア:

[(1, 20558881), (7, 2936983), (47, 437423), (49, 419569), (79, 260239), (113, 181937), (329, 62489), (553, 37177), (791, 25991), (2303, 8927), (3713, 5537), (3871, 5311)]