21281427

素因数分解:

$3^3\times {\mathrm{503}}^1\times {\mathrm{1567}}^1$

素因数の和:2079

約数の個数: 16

約数和(自身を含む): 31610880

約数和(自身を除く): 10329453

約数列:

[1, 3, 9, 27, 503, 1509, 1567, 4527, 4701, 13581, 14103, 42309, 788201, 2364603, 7093809, 21281427]

約数ペア:

[(1, 21281427), (3, 7093809), (9, 2364603), (27, 788201), (503, 42309), (1509, 14103), (1567, 13581), (4527, 4701)]