28309981

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{659}}^1$

素因数の和:721

約数の個数: 24

約数和(自身を含む): 36210240

約数和(自身を除く): 7900259

約数列:

[1, 7, 17, 19, 119, 133, 323, 361, 659, 2261, 2527, 4613, 6137, 11203, 12521, 42959, 78421, 87647, 212857, 237899, 1489999, 1665293, 4044283, 28309981]

約数ペア:

[(1, 28309981), (7, 4044283), (17, 1665293), (19, 1489999), (119, 237899), (133, 212857), (323, 87647), (361, 78421), (659, 42959), (2261, 12521), (2527, 11203), (4613, 6137)]