648991

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:198

約数の個数: 16

約数和(自身を含む): 806400

約数和(自身を除く): 157409

約数列:

[1, 7, 23, 29, 139, 161, 203, 667, 973, 3197, 4031, 4669, 22379, 28217, 92713, 648991]

約数ペア:

[(1, 648991), (7, 92713), (23, 28217), (29, 22379), (139, 4669), (161, 4031), (203, 3197), (667, 973)]