I translated to English so I am sorry if you don't know English.
You are basically split up 135. You can start by doing 135/ divided by 5 which 27. 5 is a prime number so we are done dividing that number, but we can still split up 27. If you know your multiplication facts you know that 9 x 3 = 27. Then we know we are done with 3 because it is also a prime number. The 9 is split into 3 x 3 because those multiples equal 9.
In the end our prime factors are: 3x3x3x5 or 3^3 x 5
Factorization Tree:
135
/ \
27 x 5
/ \
9x3
/ \
3x3
Hope this helped :)
