255717

素因数分解:

$3^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1$

素因数の和:71

約数の個数: 40

約数和(自身を含む): 487872

約数和(自身を除く): 232155

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 41, 63, 77, 81, 99, 123, 189, 231, 287, 297, 369, 451, 567, 693, 861, 891, 1107, 1353, 2079, 2583, 3157, 3321, 4059, 6237, 7749, 9471, 12177, 23247, 28413, 36531, 85239, 255717]

約数ペア:

[(1, 255717), (3, 85239), (7, 36531), (9, 28413), (11, 23247), (21, 12177), (27, 9471), (33, 7749), (41, 6237), (63, 4059), (77, 3321), (81, 3157), (99, 2583), (123, 2079), (189, 1353), (231, 1107), (287, 891), (297, 861), (369, 693), (451, 567)]