19997021

素因数分解:

${\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{631}}^1$

素因数の和:752

約数の個数: 16

約数和(自身を含む): 22691328

約数和(自身を除く): 2694307

約数列:

[1, 11, 43, 67, 473, 631, 737, 2881, 6941, 27133, 31691, 42277, 298463, 465047, 1817911, 19997021]

約数ペア:

[(1, 19997021), (11, 1817911), (43, 465047), (67, 298463), (473, 42277), (631, 31691), (737, 27133), (2881, 6941)]