20128171

素因数分解:

$7^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{233}}^1$

素因数の和:331

約数の個数: 24

約数和(自身を含む): 24648624

約数和(自身を除く): 4520453

約数列:

[1, 7, 41, 43, 49, 233, 287, 301, 1631, 1763, 2009, 2107, 9553, 10019, 11417, 12341, 66871, 70133, 86387, 410779, 468097, 490931, 2875453, 20128171]

約数ペア:

[(1, 20128171), (7, 2875453), (41, 490931), (43, 468097), (49, 410779), (233, 86387), (287, 70133), (301, 66871), (1631, 12341), (1763, 11417), (2009, 10019), (2107, 9553)]