20172957

素因数分解:

$3^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{1259}}^1$

素因数の和:1385

約数の個数: 24

約数和(自身を含む): 31600800

約数和(自身を除く): 11427843

約数列:

[1, 3, 7, 21, 49, 109, 147, 327, 763, 1259, 2289, 3777, 5341, 8813, 16023, 26439, 61691, 137231, 185073, 411693, 960617, 2881851, 6724319, 20172957]

約数ペア:

[(1, 20172957), (3, 6724319), (7, 2881851), (21, 960617), (49, 411693), (109, 185073), (147, 137231), (327, 61691), (763, 26439), (1259, 16023), (2289, 8813), (3777, 5341)]