18981333

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{479}}^1$

素因数の和:546

約数の個数: 48

約数和(自身を含む): 34145280

約数和(自身を除く): 15163947

約数列:

[1, 3, 7, 9, 17, 21, 37, 51, 63, 111, 119, 153, 259, 333, 357, 479, 629, 777, 1071, 1437, 1887, 2331, 3353, 4311, 4403, 5661, 8143, 10059, 13209, 17723, 24429, 30177, 39627, 53169, 57001, 73287, 124061, 159507, 171003, 301291, 372183, 513009, 903873, 1116549, 2109037, 2711619, 6327111, 18981333]

約数ペア:

[(1, 18981333), (3, 6327111), (7, 2711619), (9, 2109037), (17, 1116549), (21, 903873), (37, 513009), (51, 372183), (63, 301291), (111, 171003), (119, 159507), (153, 124061), (259, 73287), (333, 57001), (357, 53169), (479, 39627), (629, 30177), (777, 24429), (1071, 17723), (1437, 13209), (1887, 10059), (2331, 8143), (3353, 5661), (4311, 4403)]