20317213

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{157}}^1$

素因数の和:329

約数の個数: 24

約数和(自身を含む): 25216800

約数和(自身を除く): 4899587

約数列:

[1, 7, 19, 49, 133, 139, 157, 931, 973, 1099, 2641, 2983, 6811, 7693, 18487, 20881, 21823, 129409, 146167, 152761, 414637, 1069327, 2902459, 20317213]

約数ペア:

[(1, 20317213), (7, 2902459), (19, 1069327), (49, 414637), (133, 152761), (139, 146167), (157, 129409), (931, 21823), (973, 20881), (1099, 18487), (2641, 7693), (2983, 6811)]