19987131

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{3779}}^1$

素因数の和:3866

約数の個数: 16

約数和(自身を含む): 27941760

約数和(自身を除く): 7954629

約数列:

[1, 3, 41, 43, 123, 129, 1763, 3779, 5289, 11337, 154939, 162497, 464817, 487491, 6662377, 19987131]

約数ペア:

[(1, 19987131), (3, 6662377), (41, 487491), (43, 464817), (123, 162497), (129, 154939), (1763, 11337), (3779, 5289)]