520905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1$

素因数の和:78

約数の個数: 48

約数和(自身を含む): 1072512

約数和(自身を除く): 551607

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 41, 55, 77, 105, 121, 123, 165, 205, 231, 287, 363, 385, 451, 605, 615, 847, 861, 1155, 1353, 1435, 1815, 2255, 2541, 3157, 4235, 4305, 4961, 6765, 9471, 12705, 14883, 15785, 24805, 34727, 47355, 74415, 104181, 173635, 520905]

約数ペア:

[(1, 520905), (3, 173635), (5, 104181), (7, 74415), (11, 47355), (15, 34727), (21, 24805), (33, 15785), (35, 14883), (41, 12705), (55, 9471), (77, 6765), (105, 4961), (121, 4305), (123, 4235), (165, 3157), (205, 2541), (231, 2255), (287, 1815), (363, 1435), (385, 1353), (451, 1155), (605, 861), (615, 847)]