Determine the prime factors of 21:
21
Final Answer: The prime factors of 21 are \(\boxed{3 * 7}\).
Step 1 :Determine the prime factors of 21.
Step 2 :To find the prime factors of 21, first find all the prime numbers that can divide 21 without leaving a remainder. Then, divide 21 by those prime numbers until the quotient is 1.
Step 3 :number = 21
Step 4 :factors = [3, 7]
Step 5 :Final Answer: The prime factors of 21 are \(\boxed{3 * 7}\).