18945819

素因数分解:

$3^4\times {\mathrm{151}}^1\times {\mathrm{1549}}^1$

素因数の和:1712

約数の個数: 20

約数和(自身を含む): 28507600

約数和(自身を除く): 9561781

約数列:

[1, 3, 9, 27, 81, 151, 453, 1359, 1549, 4077, 4647, 12231, 13941, 41823, 125469, 233899, 701697, 2105091, 6315273, 18945819]

約数ペア:

[(1, 18945819), (3, 6315273), (9, 2105091), (27, 701697), (81, 233899), (151, 125469), (453, 41823), (1359, 13941), (1549, 12231), (4077, 4647)]