20217967

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{1889}}^1$

素因数の和:2046

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 5183633

約数列:

[1, 7, 11, 77, 139, 973, 1529, 1889, 10703, 13223, 20779, 145453, 262571, 1837997, 2888281, 20217967]

約数ペア:

[(1, 20217967), (7, 2888281), (11, 1837997), (77, 262571), (139, 145453), (973, 20779), (1529, 13223), (1889, 10703)]