18938619

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{6991}}^1$

素因数の和:7047

約数の個数: 24

約数和(自身を含む): 31995392

約数和(自身を除く): 13056773

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 6991, 20973, 48937, 62919, 146811, 300613, 440433, 901839, 2104291, 2705517, 6312873, 18938619]

約数ペア:

[(1, 18938619), (3, 6312873), (7, 2705517), (9, 2104291), (21, 901839), (43, 440433), (63, 300613), (129, 146811), (301, 62919), (387, 48937), (903, 20973), (2709, 6991)]