18927181

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{691}}^1$

素因数の和:761

約数の個数: 24

約数和(自身を含む): 24297504

約数和(自身を除く): 5370323

約数列:

[1, 7, 13, 43, 49, 91, 301, 559, 637, 691, 2107, 3913, 4837, 8983, 27391, 29713, 33859, 62881, 207991, 386269, 440167, 1455937, 2703883, 18927181]

約数ペア:

[(1, 18927181), (7, 2703883), (13, 1455937), (43, 440167), (49, 386269), (91, 207991), (301, 62881), (559, 33859), (637, 29713), (691, 27391), (2107, 8983), (3913, 4837)]