20811441

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1213}}^1$

素因数の和:1285

約数の個数: 32

約数和(自身を含む): 34186240

約数和(自身を除く): 13374799

約数列:

[1, 3, 7, 19, 21, 43, 57, 129, 133, 301, 399, 817, 903, 1213, 2451, 3639, 5719, 8491, 17157, 23047, 25473, 52159, 69141, 156477, 161329, 365113, 483987, 991021, 1095339, 2973063, 6937147, 20811441]

約数ペア:

[(1, 20811441), (3, 6937147), (7, 2973063), (19, 1095339), (21, 991021), (43, 483987), (57, 365113), (129, 161329), (133, 156477), (301, 69141), (399, 52159), (817, 25473), (903, 23047), (1213, 17157), (2451, 8491), (3639, 5719)]