81289131

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31991}}^1$

素因数の和:32023

約数の個数: 24

約数和(自身を含む): 136157952

約数和(自身を除く): 54868821

約数列:

[1, 3, 7, 11, 21, 33, 77, 121, 231, 363, 847, 2541, 31991, 95973, 223937, 351901, 671811, 1055703, 2463307, 3870911, 7389921, 11612733, 27096377, 81289131]

約数ペア:

[(1, 81289131), (3, 27096377), (7, 11612733), (11, 7389921), (21, 3870911), (33, 2463307), (77, 1055703), (121, 671811), (231, 351901), (363, 223937), (847, 95973), (2541, 31991)]