18557987

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{1579}}^1$

素因数の和:1682

約数の個数: 16

約数和(自身を含む): 22448640

約数和(自身を除く): 3890653

約数列:

[1, 7, 23, 73, 161, 511, 1579, 1679, 11053, 11753, 36317, 115267, 254219, 806869, 2651141, 18557987]

約数ペア:

[(1, 18557987), (7, 2651141), (23, 806869), (73, 254219), (161, 115267), (511, 36317), (1579, 11753), (1679, 11053)]