20980818

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{27107}}^1$

素因数の和:27158

約数の個数: 24

約数和(自身を含む): 46517328

約数和(自身を除く): 25536510

約数列:

[1, 2, 3, 6, 9, 18, 43, 86, 129, 258, 387, 774, 27107, 54214, 81321, 162642, 243963, 487926, 1165601, 2331202, 3496803, 6993606, 10490409, 20980818]

約数ペア:

[(1, 20980818), (2, 10490409), (3, 6993606), (6, 3496803), (9, 2331202), (18, 1165601), (43, 487926), (86, 243963), (129, 162642), (258, 81321), (387, 54214), (774, 27107)]