1280391

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3209}}^1$

素因数の和:3238

約数の個数: 16

約数和(自身を含む): 2054400

約数和(自身を除く): 774009

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 3209, 9627, 22463, 60971, 67389, 182913, 426797, 1280391]

約数ペア:

[(1, 1280391), (3, 426797), (7, 182913), (19, 67389), (21, 60971), (57, 22463), (133, 9627), (399, 3209)]