Răspuns :
18 => 1, 2, 3, 6, 9, 18 => 6 => 18=2×3^2;
32 => 1, 2, 4, 8, 16, 32=> 6=> 32= 2×2^4;
56 => 1, 2, 4, 7, 8, 14, 28, 56 => 8 => 56= 2^3×7;
144 => 1, 2, 3, 4, 6, 8, 12, 14, 18, 36, 48, 72, 144 => 13 => 144= 2^4×3^2;
200=> 1, 2, 4, 5, 8, 10, 25, 40, 50, 100, 200=> 11 => 200= 2^3×5^2;
729 => 1, 3, 9, 27, 81, 243, 729 => 7 => 729= 3^6;