19981073

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{107}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 24328512

約数和(自身を除く): 4347439

約数列:

[1, 7, 37, 49, 103, 107, 259, 721, 749, 1813, 3811, 3959, 5047, 5243, 11021, 26677, 27713, 77147, 186739, 193991, 407777, 540029, 2854439, 19981073]

約数ペア:

[(1, 19981073), (7, 2854439), (37, 540029), (49, 407777), (103, 193991), (107, 186739), (259, 77147), (721, 27713), (749, 26677), (1813, 11021), (3811, 5243), (3959, 5047)]