20997242

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{409}}^1$

素因数の和:630

約数の個数: 32

約数和(自身を含む): 38179200

約数和(自身を除く): 17181958

約数列:

[1, 2, 7, 14, 19, 38, 133, 193, 266, 386, 409, 818, 1351, 2702, 2863, 3667, 5726, 7334, 7771, 15542, 25669, 51338, 54397, 78937, 108794, 157874, 552559, 1105118, 1499803, 2999606, 10498621, 20997242]

約数ペア:

[(1, 20997242), (2, 10498621), (7, 2999606), (14, 1499803), (19, 1105118), (38, 552559), (133, 157874), (193, 108794), (266, 78937), (386, 54397), (409, 51338), (818, 25669), (1351, 15542), (2702, 7771), (2863, 7334), (3667, 5726)]