18998721

素因数分解:

$3^2\times 7^2\times {\mathrm{67}}^1\times {\mathrm{643}}^1$

素因数の和:730

約数の個数: 36

約数和(自身を含む): 32449872

約数和(自身を除く): 13451151

約数列:

[1, 3, 7, 9, 21, 49, 63, 67, 147, 201, 441, 469, 603, 643, 1407, 1929, 3283, 4221, 4501, 5787, 9849, 13503, 29547, 31507, 40509, 43081, 94521, 129243, 283563, 301567, 387729, 904701, 2110969, 2714103, 6332907, 18998721]

約数ペア:

[(1, 18998721), (3, 6332907), (7, 2714103), (9, 2110969), (21, 904701), (49, 387729), (63, 301567), (67, 283563), (147, 129243), (201, 94521), (441, 43081), (469, 40509), (603, 31507), (643, 29547), (1407, 13503), (1929, 9849), (3283, 5787), (4221, 4501)]