The factors of 156 are 1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156.
Here is how you calculate the factors of 156. First, every number is divisible by itself and 1.
 Try 1. 1 x 156 = 156, so put these into our factor list.
 Take 2. 2 x 78 = 156, which means we add these to our factor list.
 Now take 3. 3 x 52 = 156, so now we put these in our list of factors.
 Next try 4. 4 x 39 = 156, so we add these to our list of factors.
 Now try 5... nope! 156/5 isn't a whole number. So we skip 5.
 Try 6. 6 x 26 = 156, which means we add these to our factor list.
 Take 7... no. 156/7 isn't a whole number. So we skip 7.
 Now take 8... no luck. 156/8 isn't a whole number. So we skip 8.
 Next try 9... nope! 156/9 isn't a whole number. So we skip 9.
 Now try 10... no good. 156/10 isn't a whole number. So we skip 10.
 Try 11... no. 156/11 isn't a whole number. So we skip 11.
 Take 12. 12 x 13 = 156, so we add these to our list of factors.
 Now, since we don't have any more numbers to try, we're done!
What are the prime factors of 156? What is the prime factorization of 156?
