Răspuns :
axb=14
a - nr natural b-numar natural a,b≠0
a∈{1,2,7,14}
b∈{14,7,2,1}
axb=18
a∈{1,2,3,6,9,18}
b∈{18,9,6,3,2,1}
axb=16
a∈{1,2,4,8,16}
b∈{16,8,4,2,1}
axb=12
a∈{1,2,3,4,6,12}
b∈{12,6,4,3,2,1}
a - nr natural b-numar natural a,b≠0
a∈{1,2,7,14}
b∈{14,7,2,1}
axb=18
a∈{1,2,3,6,9,18}
b∈{18,9,6,3,2,1}
axb=16
a∈{1,2,4,8,16}
b∈{16,8,4,2,1}
axb=12
a∈{1,2,3,4,6,12}
b∈{12,6,4,3,2,1}