16720997

素因数分解:

${\mathrm{31}}^1\times {\mathrm{71}}^2\times {\mathrm{107}}^1$

素因数の和:280

約数の個数: 12

約数和(自身を含む): 17670528

約数和(自身を除く): 949531

約数列:

[1, 31, 71, 107, 2201, 3317, 5041, 7597, 156271, 235507, 539387, 16720997]

約数ペア:

[(1, 16720997), (31, 539387), (71, 235507), (107, 156271), (2201, 7597), (3317, 5041)]