21543879

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{233}}^1$

素因数の和:304

約数の個数: 48

約数和(自身を含む): 36492768

約数和(自身を除く): 14948889

約数列:

[1, 3, 7, 17, 21, 37, 49, 51, 111, 119, 147, 233, 259, 357, 629, 699, 777, 833, 1631, 1813, 1887, 2499, 3961, 4403, 4893, 5439, 8621, 11417, 11883, 13209, 25863, 27727, 30821, 34251, 60347, 83181, 92463, 146557, 181041, 194089, 422429, 439671, 582267, 1025899, 1267287, 3077697, 7181293, 21543879]

約数ペア:

[(1, 21543879), (3, 7181293), (7, 3077697), (17, 1267287), (21, 1025899), (37, 582267), (49, 439671), (51, 422429), (111, 194089), (119, 181041), (147, 146557), (233, 92463), (259, 83181), (357, 60347), (629, 34251), (699, 30821), (777, 27727), (833, 25863), (1631, 13209), (1813, 11883), (1887, 11417), (2499, 8621), (3961, 5439), (4403, 4893)]