18540561

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{191}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 28385280

約数和(自身を除く): 9844719

約数列:

[1, 3, 13, 19, 39, 57, 131, 191, 247, 393, 573, 741, 1703, 2483, 2489, 3629, 5109, 7449, 7467, 10887, 25021, 32357, 47177, 75063, 97071, 141531, 325273, 475399, 975819, 1426197, 6180187, 18540561]

約数ペア:

[(1, 18540561), (3, 6180187), (13, 1426197), (19, 975819), (39, 475399), (57, 325273), (131, 141531), (191, 97071), (247, 75063), (393, 47177), (573, 32357), (741, 25021), (1703, 10887), (2483, 7467), (2489, 7449), (3629, 5109)]