18311991

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{311}}^1\times {\mathrm{1033}}^1$

素因数の和:1366

約数の個数: 16

約数和(自身を含む): 25808640

約数和(自身を除く): 7496649

約数列:

[1, 3, 19, 57, 311, 933, 1033, 3099, 5909, 17727, 19627, 58881, 321263, 963789, 6103997, 18311991]

約数ペア:

[(1, 18311991), (3, 6103997), (19, 963789), (57, 321263), (311, 58881), (933, 19627), (1033, 17727), (3099, 5909)]