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Factors of 49: As Taught by a Math Tutor
Methods
What are the Factors of 49?
As your math tutor, I’m here to guide you through the different types of factors of 49. Understanding factors is key to mastering multiplication, division, and prime numbers. Here’s a breakdown:
• Factors of 49: 1, 7, 49
• Sum of Factors of 49: 57
• Negative Factors of 49: -1, -7, -49
• Prime Factors of 49: 7
• Prime Factorization of 49: 7^2
There are two main ways a math tutor would explain how to find the factors of 49: using factor pairs and prime factorization. Let’s explore both!
The Factor Pairs of 49
As your math tutor, I’m here to help you break down factor pairs of 49 step by step!
Factor pairs of 49 are any two numbers that, when multiplied together, equal 49. The question to ask is “what two numbers multiplied together equal 49?” Every factor can be paired with another factor, and multiplying the two will result in 49.
To find the factor pairs of 49, follow these steps:
Step 1:
Find the smallest prime number that is larger than 1, and is a factor of 49. For reference, the first prime numbers to check are 2, 3, 5, 7, 11, and 13. In this case, the smallest factor that’s a prime number larger than 1 is 7.
Step 2:
Divide 49 by the smallest prime factor, in this case, 7:
49 ÷ 7 = 7
7 and 7 will make a new factor pair.
Step 3:
Repeat Steps 1 and 2, using 7 as the new focus. Find the smallest prime factor that isn’t 1, and divide 7 by that number. In this case, 7 is the new smallest prime factor:
7 ÷ 7 = 1
Remember that this new factor pair is only for the factors of 7, not 49. So, to finish the factor pair for 49, you’d multiply 7 and 7 before pairing with 1:
7 x 7 = 49
Step 4:
Repeat this process until there are no longer any prime factors larger than one to divide by. At the end, you should have the full list of factor pairs.
Here are all the factor pairs for 49:
(1, 49), (7, 7)
So, to list all the factors of 49: 1, 7, 49
The negative factors of 49 would be: -1, -7, -49
Now you’ve got it! A math tutor would always encourage you to practice with different numbers to reinforce your understanding of factor pairs. Try another one!
Prime Factorization of 49
To find the prime factorization of 49, we break it down step by step until only prime factors remain. Then, we express 49 as a product of these prime factors multiplied together. Let’s go through the process and simplify it like a math tutor would!
The process of finding the prime factorization of 49 only has a few differences from the above method of finding the factors of 49. Instead of ensuring we find the right factor pairs, we continue to factor each step until we are left with only the list of smallest prime factors greater than 1.
Here are the steps for finding the prime factorization of 49:
Step 1:
Find the smallest prime number that is larger than 1, and is a factor of 49. For reference, the first prime numbers to check are 2, 3, 5, 7, 11, and 13. In this case, the smallest factor that’s a prime number larger than 1 is 7.
Step 2:
Divide 49 by the smallest prime factor, in this case, 7
49 ÷ 7 = 7
7 becomes the first number in our prime factorization.
Step 3:
Repeat Steps 1 and 2, using 7 as the new focus. Find the smallest prime factor that isn’t 1, and divide 7 by that number. The smallest prime factor you pick for 7 will then be the next prime factor. If you keep repeating this process, there will be a point where there will be no more prime factors left, which leaves you with the prime factors for prime factorization.
So, the unique prime factors of 49 are: 7
Math Tutor Suggests: Find the Factors of Other Numbers
Practice your factoring skills by exploring how to factor other numbers, like the ones below:
Factors of 19 - The factors of 19 are 1, 19
Factors of 91 - The factors of 91 are 1, 7, 13, 91
Factors of 63 - The factors of 63 are 1, 3, 7, 9, 21, 63
Factors of 105 - The factors of 105 are 1, 3, 5, 7, 15, 21, 35, 105
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