21556556

素因数分解:

$2^2\times 7^1\times {\mathrm{193}}^1\times {\mathrm{3989}}^1$

素因数の和:4193

約数の個数: 24

約数和(自身を含む): 43347360

約数和(自身を除く): 21790804

約数列:

[1, 2, 4, 7, 14, 28, 193, 386, 772, 1351, 2702, 3989, 5404, 7978, 15956, 27923, 55846, 111692, 769877, 1539754, 3079508, 5389139, 10778278, 21556556]

約数ペア:

[(1, 21556556), (2, 10778278), (4, 5389139), (7, 3079508), (14, 1539754), (28, 769877), (193, 111692), (386, 55846), (772, 27923), (1351, 15956), (2702, 7978), (3989, 5404)]