1990697787

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{239641}}^1$

素因数の和:239731

約数の個数: 24

約数和(自身を含む): 3140268768

約数和(自身を除く): 1149570981

約数列:

[1, 3, 9, 13, 39, 71, 117, 213, 639, 923, 2769, 8307, 239641, 718923, 2156769, 3115333, 9345999, 17014511, 28037997, 51043533, 153130599, 221188643, 663565929, 1990697787]

約数ペア:

[(1, 1990697787), (3, 663565929), (9, 221188643), (13, 153130599), (39, 51043533), (71, 28037997), (117, 17014511), (213, 9345999), (639, 3115333), (923, 2156769), (2769, 718923), (8307, 239641)]