20319607

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1$

素因数の和:116

約数の個数: 48

約数和(自身を含む): 28968192

約数和(自身を除く): 8648585

約数列:

[1, 7, 11, 17, 19, 43, 77, 119, 133, 187, 209, 301, 323, 361, 473, 731, 817, 1309, 1463, 2261, 2527, 3311, 3553, 3971, 5117, 5719, 6137, 8041, 8987, 13889, 15523, 24871, 27797, 42959, 56287, 62909, 67507, 97223, 108661, 152779, 170753, 263891, 472549, 1069453, 1195271, 1847237, 2902801, 20319607]

約数ペア:

[(1, 20319607), (7, 2902801), (11, 1847237), (17, 1195271), (19, 1069453), (43, 472549), (77, 263891), (119, 170753), (133, 152779), (187, 108661), (209, 97223), (301, 67507), (323, 62909), (361, 56287), (473, 42959), (731, 27797), (817, 24871), (1309, 15523), (1463, 13889), (2261, 8987), (2527, 8041), (3311, 6137), (3553, 5719), (3971, 5117)]