19911472

素因数分解:

$2^4\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1279}}^1$

素因数の和:1433

約数の個数: 40

約数和(自身を含む): 44441600

約数和(自身を除く): 24530128

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 139, 278, 556, 973, 1112, 1279, 1946, 2224, 2558, 3892, 5116, 7784, 8953, 10232, 15568, 17906, 20464, 35812, 71624, 143248, 177781, 355562, 711124, 1244467, 1422248, 2488934, 2844496, 4977868, 9955736, 19911472]

約数ペア:

[(1, 19911472), (2, 9955736), (4, 4977868), (7, 2844496), (8, 2488934), (14, 1422248), (16, 1244467), (28, 711124), (56, 355562), (112, 177781), (139, 143248), (278, 71624), (556, 35812), (973, 20464), (1112, 17906), (1279, 15568), (1946, 10232), (2224, 8953), (2558, 7784), (3892, 5116)]