20411680

素因数分解:

$2^5\times 5^1\times {\mathrm{193}}^1\times {\mathrm{661}}^1$

素因数の和:869

約数の個数: 48

約数和(自身を含む): 48545784

約数和(自身を除く): 28134104

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 193, 386, 661, 772, 965, 1322, 1544, 1930, 2644, 3088, 3305, 3860, 5288, 6176, 6610, 7720, 10576, 13220, 15440, 21152, 26440, 30880, 52880, 105760, 127573, 255146, 510292, 637865, 1020584, 1275730, 2041168, 2551460, 4082336, 5102920, 10205840, 20411680]

約数ペア:

[(1, 20411680), (2, 10205840), (4, 5102920), (5, 4082336), (8, 2551460), (10, 2041168), (16, 1275730), (20, 1020584), (32, 637865), (40, 510292), (80, 255146), (160, 127573), (193, 105760), (386, 52880), (661, 30880), (772, 26440), (965, 21152), (1322, 15440), (1544, 13220), (1930, 10576), (2644, 7720), (3088, 6610), (3305, 6176), (3860, 5288)]