18820881

素因数分解:

$3^2\times {\mathrm{79}}^1\times {\mathrm{103}}^1\times {\mathrm{257}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 27905280

約数和(自身を除く): 9084399

約数列:

[1, 3, 9, 79, 103, 237, 257, 309, 711, 771, 927, 2313, 8137, 20303, 24411, 26471, 60909, 73233, 79413, 182727, 238239, 2091209, 6273627, 18820881]

約数ペア:

[(1, 18820881), (3, 6273627), (9, 2091209), (79, 238239), (103, 182727), (237, 79413), (257, 73233), (309, 60909), (711, 26471), (771, 24411), (927, 20303), (2313, 8137)]