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.
2x2x2x2x3x3
144 = 24 32
The prime factors of 144 are: 2,3
24*32 = 144
144 = 24 x 32
24 x 32 = 144
24 x 32 = 144
144 72,2 36,2,2 18,2,2,2 9,2,2,2,2 3,3,2,2,2,2
144
It is: 144