20109555

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{271}}^1$

素因数の和:396

約数の個数: 48

約数和(自身を含む): 37425024

約数和(自身を除く): 17315469

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 97, 153, 255, 271, 291, 485, 765, 813, 873, 1355, 1455, 1649, 2439, 4065, 4365, 4607, 4947, 8245, 12195, 13821, 14841, 23035, 24735, 26287, 41463, 69105, 74205, 78861, 131435, 207315, 236583, 394305, 446879, 1182915, 1340637, 2234395, 4021911, 6703185, 20109555]

約数ペア:

[(1, 20109555), (3, 6703185), (5, 4021911), (9, 2234395), (15, 1340637), (17, 1182915), (45, 446879), (51, 394305), (85, 236583), (97, 207315), (153, 131435), (255, 78861), (271, 74205), (291, 69105), (485, 41463), (765, 26287), (813, 24735), (873, 23035), (1355, 14841), (1455, 13821), (1649, 12195), (2439, 8245), (4065, 4947), (4365, 4607)]