16720439

素因数分解:

${\mathrm{31}}^2\times {\mathrm{127}}^1\times {\mathrm{137}}^1$

素因数の和:326

約数の個数: 12

約数和(自身を含む): 17540352

約数和(自身を除く): 819913

約数列:

[1, 31, 127, 137, 961, 3937, 4247, 17399, 122047, 131657, 539369, 16720439]

約数ペア:

[(1, 16720439), (31, 539369), (127, 131657), (137, 122047), (961, 17399), (3937, 4247)]