20957859

素因数分解:

$3^4\times {\mathrm{13}}^2\times {\mathrm{1531}}^1$

素因数の和:1569

約数の個数: 30

約数和(自身を含む): 33923076

約数和(自身を除く): 12965217

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 169, 351, 507, 1053, 1521, 1531, 4563, 4593, 13689, 13779, 19903, 41337, 59709, 124011, 179127, 258739, 537381, 776217, 1612143, 2328651, 6985953, 20957859]

約数ペア:

[(1, 20957859), (3, 6985953), (9, 2328651), (13, 1612143), (27, 776217), (39, 537381), (81, 258739), (117, 179127), (169, 124011), (351, 59709), (507, 41337), (1053, 19903), (1521, 13779), (1531, 13689), (4563, 4593)]