List All Factors of the Number 4: A Fundamental Exercise

To solve this problem, we'll follow these steps:

• Identify all the factors of the number 4.
• Determine which of these factors are prime numbers.
• Check the answer choices to find the one that corresponds to the prime factorization of 4.

Now, let's work through each step:
Step 1: To find the factors of 4, we consider pairs of numbers that multiply to 4, such as $1 \times 4$ and $2 \times 2$.
Step 2: Among these factors, identify the prime numbers. The number 2 is the only prime factor, and it needs to be listed twice since $2 \times 2 = 4$.
Step 3: Looking at the answer choices, the choice that corresponds to the prime factorization of 4 is $2, 2$.

Therefore, the correct answer is $2, 2$.