18874999

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{6947}}^1$

素因数の和:6990

約数の個数: 16

約数和(自身を含む): 23345280

約数和(自身を除く): 4470281

約数列:

[1, 11, 13, 19, 143, 209, 247, 2717, 6947, 76417, 90311, 131993, 993421, 1451923, 1715909, 18874999]

約数ペア:

[(1, 18874999), (11, 1715909), (13, 1451923), (19, 993421), (143, 131993), (209, 90311), (247, 76417), (2717, 6947)]