That's a prime factorization.
The only name is factorization.
the prime factorization
A factor free is a diagram showing the prime factorization of a number.
If completed correctly, the bottom branch of a factor tree will be the prime factorization of the number at the top.
If the prime factorization contains a 5 and a 7, 35 is a factor.
23 is prime.
Writing a number as the product of its prime factors is called prime factorization.
A Factor Tree
The prime factorization
factor tree
1049 is a prime number; no factorization.