21251571

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{113}}^1\times {\mathrm{139}}^1$

素因数の和:307

約数の個数: 32

約数和(自身を含む): 32175360

約数和(自身を除く): 10923789

約数列:

[1, 3, 11, 33, 41, 113, 123, 139, 339, 417, 451, 1243, 1353, 1529, 3729, 4587, 4633, 5699, 13899, 15707, 17097, 47121, 50963, 62689, 152889, 172777, 188067, 518331, 643987, 1931961, 7083857, 21251571]

約数ペア:

[(1, 21251571), (3, 7083857), (11, 1931961), (33, 643987), (41, 518331), (113, 188067), (123, 172777), (139, 152889), (339, 62689), (417, 50963), (451, 47121), (1243, 17097), (1353, 15707), (1529, 13899), (3729, 5699), (4587, 4633)]