20101081

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{467}}^1$

素因数の和:541

約数の個数: 32

約数和(自身を含む): 27675648

約数和(自身を除く): 7574567

約数列:

[1, 7, 11, 13, 43, 77, 91, 143, 301, 467, 473, 559, 1001, 3269, 3311, 3913, 5137, 6071, 6149, 20081, 35959, 42497, 43043, 66781, 140567, 220891, 261053, 467467, 1546237, 1827371, 2871583, 20101081]

約数ペア:

[(1, 20101081), (7, 2871583), (11, 1827371), (13, 1546237), (43, 467467), (77, 261053), (91, 220891), (143, 140567), (301, 66781), (467, 43043), (473, 42497), (559, 35959), (1001, 20081), (3269, 6149), (3311, 6071), (3913, 5137)]