18987983

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1\times {\mathrm{317}}^1$

素因数の和:566

約数の個数: 16

約数和(自身を含む): 22387200

約数和(自身を除く): 3399217

約数列:

[1, 7, 43, 199, 301, 317, 1393, 2219, 8557, 13631, 59899, 63083, 95417, 441581, 2712569, 18987983]

約数ペア:

[(1, 18987983), (7, 2712569), (43, 441581), (199, 95417), (301, 63083), (317, 59899), (1393, 13631), (2219, 8557)]