18489919

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{613}}^1$

素因数の和:790

約数の個数: 16

約数和(自身を含む): 22005760

約数和(自身を除く): 3515841

約数列:

[1, 7, 31, 139, 217, 613, 973, 4291, 4309, 19003, 30163, 85207, 133021, 596449, 2641417, 18489919]

約数ペア:

[(1, 18489919), (7, 2641417), (31, 596449), (139, 133021), (217, 85207), (613, 30163), (973, 19003), (4291, 4309)]