19997791

素因数分解:

${\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:231

約数の個数: 24

約数和(自身を含む): 23461200

約数和(自身を除く): 3463409

約数列:

[1, 11, 29, 41, 121, 139, 319, 451, 1189, 1529, 3509, 4031, 4961, 5699, 13079, 16819, 44341, 62689, 143869, 165271, 487751, 689579, 1817981, 19997791]

約数ペア:

[(1, 19997791), (11, 1817981), (29, 689579), (41, 487751), (121, 165271), (139, 143869), (319, 62689), (451, 44341), (1189, 16819), (1529, 13079), (3509, 5699), (4031, 4961)]