19913157

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{2833}}^1$

素因数の和:2921

約数の個数: 24

約数和(自身を含む): 31831488

約数和(自身を除く): 11918331

約数列:

[1, 3, 9, 11, 33, 71, 99, 213, 639, 781, 2343, 2833, 7029, 8499, 25497, 31163, 93489, 201143, 280467, 603429, 1810287, 2212573, 6637719, 19913157]

約数ペア:

[(1, 19913157), (3, 6637719), (9, 2212573), (11, 1810287), (33, 603429), (71, 280467), (99, 201143), (213, 93489), (639, 31163), (781, 25497), (2343, 8499), (2833, 7029)]