19680157

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{251}}^1\times {\mathrm{487}}^1$

素因数の和:768

約数の個数: 16

約数和(自身を含む): 23611392

約数和(自身を除く): 3931235

約数列:

[1, 7, 23, 161, 251, 487, 1757, 3409, 5773, 11201, 40411, 78407, 122237, 855659, 2811451, 19680157]

約数ペア:

[(1, 19680157), (7, 2811451), (23, 855659), (161, 122237), (251, 78407), (487, 40411), (1757, 11201), (3409, 5773)]