66 33,2 11,3,2
a factor tree is this= 66 / \ 6 • 11 / \ 2 •3
66 33,2 11,3,2 There's no formula. Just divide your number and its factors by prime numbers until all the factors are prime.
The prime factors of 66 are: 2, 3 and 11
66 33,2 11,3,2
66 33,2 11,3,2
83 is prime. No tree.
IT IS PRIME there is no factor tree
66 33,2 11,3,2
66 33,2 11,3,2
66 33,2 11,3,2
66 33,2 11,3,2