20486557

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1109}}^1$

素因数の和:1165

約数の個数: 24

約数和(自身を含む): 26573400

約数和(自身を除く): 6086843

約数列:

[1, 7, 13, 29, 49, 91, 203, 377, 637, 1109, 1421, 2639, 7763, 14417, 18473, 32161, 54341, 100919, 225127, 418093, 706433, 1575889, 2926651, 20486557]

約数ペア:

[(1, 20486557), (7, 2926651), (13, 1575889), (29, 706433), (49, 418093), (91, 225127), (203, 100919), (377, 54341), (637, 32161), (1109, 18473), (1421, 14417), (2639, 7763)]