18991089

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{8543}}^1$

素因数の和:8581

約数の個数: 24

約数和(自身を含む): 31100160

約数和(自身を除く): 12109071

約数列:

[1, 3, 9, 13, 19, 39, 57, 117, 171, 247, 741, 2223, 8543, 25629, 76887, 111059, 162317, 333177, 486951, 999531, 1460853, 2110121, 6330363, 18991089]

約数ペア:

[(1, 18991089), (3, 6330363), (9, 2110121), (13, 1460853), (19, 999531), (39, 486951), (57, 333177), (117, 162317), (171, 111059), (247, 76887), (741, 25629), (2223, 8543)]