20898040

素因数分解:

$2^3\times 5^1\times {\mathrm{193}}^1\times {\mathrm{2707}}^1$

素因数の和:2911

約数の個数: 32

約数和(自身を含む): 47281680

約数和(自身を除く): 26383640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 193, 386, 772, 965, 1544, 1930, 2707, 3860, 5414, 7720, 10828, 13535, 21656, 27070, 54140, 108280, 522451, 1044902, 2089804, 2612255, 4179608, 5224510, 10449020, 20898040]

約数ペア:

[(1, 20898040), (2, 10449020), (4, 5224510), (5, 4179608), (8, 2612255), (10, 2089804), (20, 1044902), (40, 522451), (193, 108280), (386, 54140), (772, 27070), (965, 21656), (1544, 13535), (1930, 10828), (2707, 7720), (3860, 5414)]