16.
16
That is a very good question. The awnser is quite simple, its a number.
16 2*16 = 32
16
The only name is factorization.
the prime factorization
A factor free is a diagram showing the prime factorization of a number.
It is a factor of 32, which means it is one of 1, 2, 4, 8, 16, and 32. The perfect squares among the factors of 32 are 4 and 16. Of those two, the only one with a sum of digits that is odd is 16.
If completed correctly, the bottom branch of a factor tree will be the prime factorization of the number at the top.
65
If the prime factorization contains a 5 and a 7, 35 is a factor.