21140020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{307}}^1\times {\mathrm{313}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 48742848

約数和(自身を除く): 27602828

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 307, 313, 614, 626, 1228, 1252, 1535, 1565, 3070, 3130, 3377, 3443, 6140, 6260, 6754, 6886, 13508, 13772, 16885, 17215, 33770, 34430, 67540, 68860, 96091, 192182, 384364, 480455, 960910, 1057001, 1921820, 2114002, 4228004, 5285005, 10570010, 21140020]

約数ペア:

[(1, 21140020), (2, 10570010), (4, 5285005), (5, 4228004), (10, 2114002), (11, 1921820), (20, 1057001), (22, 960910), (44, 480455), (55, 384364), (110, 192182), (220, 96091), (307, 68860), (313, 67540), (614, 34430), (626, 33770), (1228, 17215), (1252, 16885), (1535, 13772), (1565, 13508), (3070, 6886), (3130, 6754), (3377, 6260), (3443, 6140)]