Sai rùi

108=2^2.3^3

180=2^2.3^2.5

=)UCLN(108;180)=2^2.3^2=36 Ư(36)= 1;2;3;4;6;9;12;18;36

=) ƯC(108;180)=1;2;3;4;6;9;12;18;36

Mà ước chung lại>15

UC (108;180)ϵ18;36

16^5+2^5

=(2^4)^5+2^15

=2^4.5+2^15

=2^20+2^15

=2^15.2^5+2^15.1

=2^15.(2^5+1)

=2^15.(32+1)

=2^15.33⋮33