18990587

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{3203}}^1$

素因数の和:3239

約数の個数: 18

約数和(自身を含む): 24289524

約数和(自身を除く): 5298937

約数列:

[1, 7, 11, 49, 77, 121, 539, 847, 3203, 5929, 22421, 35233, 156947, 246631, 387563, 1726417, 2712941, 18990587]

約数ペア:

[(1, 18990587), (7, 2712941), (11, 1726417), (49, 387563), (77, 246631), (121, 156947), (539, 35233), (847, 22421), (3203, 5929)]