81334421

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{19727}}^1$

素因数の和:19784

約数の個数: 16

約数和(自身を含む): 101007360

約数和(自身を除く): 19672939

約数列:

[1, 7, 19, 31, 133, 217, 589, 4123, 19727, 138089, 374813, 611537, 2623691, 4280759, 11619203, 81334421]

約数ペア:

[(1, 81334421), (7, 11619203), (19, 4280759), (31, 2623691), (133, 611537), (217, 374813), (589, 138089), (4123, 19727)]