2 * 2 * 2 * 2 * 3 * 3 = 144
Since 72 is a factor of 144, its entire prime factorization will be contained in the prime factorization of 144.
Since 72 is a factor of 144, its whole prime factorization will be contained in the prime factorization of 144.
144 72,2 36,2,2 18,2,2,2 9,2,2,2,2 3,3,2,2,2,2
2x2x2x2x3x3
since 144 is 122 you can find the primefactorization easy by noting that 12=22 x3 so 144=24x32
144 = 24 32
The prime factors of 144 are: 2,3
24*32 = 144
24 x 32 = 144
144 = 24 x 32
24 x 32 = 144
144 = 2 x 2 x 2 x 2 x 3 x 3