21451969

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:122

約数の個数: 48

約数和(自身を含む): 29962240

約数和(自身を除く): 8510271

約数列:

[1, 7, 11, 19, 31, 43, 77, 121, 133, 209, 217, 301, 341, 473, 589, 817, 847, 1333, 1463, 2299, 2387, 3311, 3751, 4123, 5203, 5719, 6479, 8987, 9331, 14663, 16093, 25327, 26257, 36421, 45353, 62909, 71269, 98857, 102641, 161293, 177289, 278597, 498883, 691999, 1129051, 1950179, 3064567, 21451969]

約数ペア:

[(1, 21451969), (7, 3064567), (11, 1950179), (19, 1129051), (31, 691999), (43, 498883), (77, 278597), (121, 177289), (133, 161293), (209, 102641), (217, 98857), (301, 71269), (341, 62909), (473, 45353), (589, 36421), (817, 26257), (847, 25327), (1333, 16093), (1463, 14663), (2299, 9331), (2387, 8987), (3311, 6479), (3751, 5719), (4123, 5203)]