201851991

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1\times {\mathrm{449}}^1$

素因数の和:724

約数の個数: 48

約数和(自身を含む): 336960000

約数和(自身を除く): 135108009

約数列:

[1, 3, 9, 11, 19, 33, 57, 99, 171, 209, 239, 449, 627, 717, 1347, 1881, 2151, 2629, 4041, 4541, 4939, 7887, 8531, 13623, 14817, 23661, 25593, 40869, 44451, 49951, 76779, 93841, 107311, 149853, 281523, 321933, 449559, 844569, 965799, 1180421, 2038909, 3541263, 6116727, 10623789, 18350181, 22427999, 67283997, 201851991]

約数ペア:

[(1, 201851991), (3, 67283997), (9, 22427999), (11, 18350181), (19, 10623789), (33, 6116727), (57, 3541263), (99, 2038909), (171, 1180421), (209, 965799), (239, 844569), (449, 449559), (627, 321933), (717, 281523), (1347, 149853), (1881, 107311), (2151, 93841), (2629, 76779), (4041, 49951), (4541, 44451), (4939, 40869), (7887, 25593), (8531, 23661), (13623, 14817)]