19747760

素因数分解:

$2^4\times 5^1\times {\mathrm{193}}^1\times {\mathrm{1279}}^1$

素因数の和:1485

約数の個数: 40

約数和(自身を含む): 46187520

約数和(自身を除く): 26439760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 193, 386, 772, 965, 1279, 1544, 1930, 2558, 3088, 3860, 5116, 6395, 7720, 10232, 12790, 15440, 20464, 25580, 51160, 102320, 246847, 493694, 987388, 1234235, 1974776, 2468470, 3949552, 4936940, 9873880, 19747760]

約数ペア:

[(1, 19747760), (2, 9873880), (4, 4936940), (5, 3949552), (8, 2468470), (10, 1974776), (16, 1234235), (20, 987388), (40, 493694), (80, 246847), (193, 102320), (386, 51160), (772, 25580), (965, 20464), (1279, 15440), (1544, 12790), (1930, 10232), (2558, 7720), (3088, 6395), (3860, 5116)]