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.
23 is prime.
If the prime factorization contains a 5 and a 7, 35 is a factor.
A Factor Tree
factor tree
The prime factorization
1049 is a prime number; no factorization.
199 is a prime number; no factorization.