19910853

素因数分解:

$3^4\times {\mathrm{401}}^1\times {\mathrm{613}}^1$

素因数の和:1026

約数の個数: 20

約数和(自身を含む): 29866188

約数和(自身を除く): 9955335

約数列:

[1, 3, 9, 27, 81, 401, 613, 1203, 1839, 3609, 5517, 10827, 16551, 32481, 49653, 245813, 737439, 2212317, 6636951, 19910853]

約数ペア:

[(1, 19910853), (3, 6636951), (9, 2212317), (27, 737439), (81, 245813), (401, 49653), (613, 32481), (1203, 16551), (1839, 10827), (3609, 5517)]