Final answer:
To split 20 into prime factors, divide it by the smallest prime number, which is 2. The prime factors of 20 are 2 x 2 x 5.
Step-by-step explanation:
To split 20 into prime factors, we need to factorize it by finding its prime factors.
We divide 20 by the smallest prime number, which is 2. 20 divided by 2 equals 10. Then, we continue dividing the result, 10, by 2 until we cannot divide further. The prime factors of 20 are 2 x 2 x 5.