18419920

素因数分解:

$2^4\times 5^1\times {\mathrm{193}}^1\times {\mathrm{1193}}^1$

素因数の和:1399

約数の個数: 40

約数和(自身を含む): 43084296

約数和(自身を除く): 24664376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 193, 386, 772, 965, 1193, 1544, 1930, 2386, 3088, 3860, 4772, 5965, 7720, 9544, 11930, 15440, 19088, 23860, 47720, 95440, 230249, 460498, 920996, 1151245, 1841992, 2302490, 3683984, 4604980, 9209960, 18419920]

約数ペア:

[(1, 18419920), (2, 9209960), (4, 4604980), (5, 3683984), (8, 2302490), (10, 1841992), (16, 1151245), (20, 920996), (40, 460498), (80, 230249), (193, 95440), (386, 47720), (772, 23860), (965, 19088), (1193, 15440), (1544, 11930), (1930, 9544), (2386, 7720), (3088, 5965), (3860, 4772)]