20813120

素因数分解:

$2^6\times 5^1\times {\mathrm{193}}^1\times {\mathrm{337}}^1$

素因数の和:547

約数の個数: 56

約数和(自身を含む): 49965864

約数和(自身を除く): 29152744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 193, 320, 337, 386, 674, 772, 965, 1348, 1544, 1685, 1930, 2696, 3088, 3370, 3860, 5392, 6176, 6740, 7720, 10784, 12352, 13480, 15440, 21568, 26960, 30880, 53920, 61760, 65041, 107840, 130082, 260164, 325205, 520328, 650410, 1040656, 1300820, 2081312, 2601640, 4162624, 5203280, 10406560, 20813120]

約数ペア:

[(1, 20813120), (2, 10406560), (4, 5203280), (5, 4162624), (8, 2601640), (10, 2081312), (16, 1300820), (20, 1040656), (32, 650410), (40, 520328), (64, 325205), (80, 260164), (160, 130082), (193, 107840), (320, 65041), (337, 61760), (386, 53920), (674, 30880), (772, 26960), (965, 21568), (1348, 15440), (1544, 13480), (1685, 12352), (1930, 10784), (2696, 7720), (3088, 6740), (3370, 6176), (3860, 5392)]