81389721

素因数分解:

$3^1\times 7^1\times {\mathrm{1097}}^1\times {\mathrm{3533}}^1$

素因数の和:4640

約数の個数: 16

約数和(自身を含む): 124170624

約数和(自身を除く): 42780903

約数列:

[1, 3, 7, 21, 1097, 3291, 3533, 7679, 10599, 23037, 24731, 74193, 3875701, 11627103, 27129907, 81389721]

約数ペア:

[(1, 81389721), (3, 27129907), (7, 11627103), (21, 3875701), (1097, 74193), (3291, 24731), (3533, 23037), (7679, 10599)]