20649629

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1$

素因数の和:466

約数の個数: 32

約数和(自身を含む): 28358400

約数和(自身を除く): 7708771

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 343, 421, 539, 637, 1001, 2947, 3773, 4459, 4631, 5473, 7007, 20629, 32417, 38311, 49049, 60203, 144403, 226919, 268177, 421421, 1588433, 1877239, 2949947, 20649629]

約数ペア:

[(1, 20649629), (7, 2949947), (11, 1877239), (13, 1588433), (49, 421421), (77, 268177), (91, 226919), (143, 144403), (343, 60203), (421, 49049), (539, 38311), (637, 32417), (1001, 20629), (2947, 7007), (3773, 5473), (4459, 4631)]