21004148

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43397}}^1$

素因数の和:43423

約数の個数: 18

約数和(自身を含む): 40403538

約数和(自身を除く): 19399390

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43397, 86794, 173588, 477367, 954734, 1909468, 5251037, 10502074, 21004148]

約数ペア:

[(1, 21004148), (2, 10502074), (4, 5251037), (11, 1909468), (22, 954734), (44, 477367), (121, 173588), (242, 86794), (484, 43397)]