505557

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1$

素因数の和:197

約数の個数: 24

約数和(自身を含む): 819000

約数和(自身を除く): 313443

約数列:

[1, 3, 9, 13, 29, 39, 87, 117, 149, 261, 377, 447, 1131, 1341, 1937, 3393, 4321, 5811, 12963, 17433, 38889, 56173, 168519, 505557]

約数ペア:

[(1, 505557), (3, 168519), (9, 56173), (13, 38889), (29, 17433), (39, 12963), (87, 5811), (117, 4321), (149, 3393), (261, 1937), (377, 1341), (447, 1131)]