12871761

素因数分解:

$3^1\times 7^4\times {\mathrm{1787}}^1$

素因数の和:1818

約数の個数: 20

約数和(自身を含む): 20032752

約数和(自身を除く): 7160991

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 1787, 2401, 5361, 7203, 12509, 37527, 87563, 262689, 612941, 1838823, 4290587, 12871761]

約数ペア:

[(1, 12871761), (3, 4290587), (7, 1838823), (21, 612941), (49, 262689), (147, 87563), (343, 37527), (1029, 12509), (1787, 7203), (2401, 5361)]