What are the Factors of 129?

The following are the different types of factors of 129:

• Factors of 129: 1, 3, 43, 129

• Sum of Factors of 129: 176

• Negative Factors of 129: -1, -3, -43, -129

• Prime Factors of 129: 3, 43

• Prime Factorization of 129: 3^1 × 43^1

There are two ways to find the factors of 129: using factor pairs, and using prime factorization.

Factor pairs of 129 are any two numbers that, when multiplied together, equal 129. The question to ask is “what two numbers multiplied together equal 129?” Every factor can be paired with another factor, and multiplying the two will result in 129.

To find the factor pairs of 129, follow these steps:

Step 1:

Find the smallest prime number that is larger than 1, and is a factor of 129. 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 3.

Step 2:

Divide 129 by the smallest prime factor, in this case, 3:

129 ÷ 3 = 43

3 and 43 will make a new factor pair.

Step 3:

Repeat Steps 1 and 2, using 43 as the new focus. Find the smallest prime factor that isn’t 1, and divide 43 by that number. In this case, 43 is the new smallest prime factor:

43 ÷ 43 = 1

Remember that this new factor pair is only for the factors of 43, not 129. So, to finish the factor pair for 129, you’d multiply 3 and 43 before pairing with 1:

3 x 43 = 129

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 129:

(1, 129), (3, 43)

So, to list all the factors of 129: 1, 3, 43, 129

The negative factors of 129 would be: -1, -3, -43, -129

To find the Prime factorization of 129, we break down all the factors of 129 until we are left with only prime factors. We then express n as a product of multiplying the prime factors together.

The process of finding the prime factorization of 129 only has a few differences from the above method of finding the factors of 129. 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 129:

Step 1:

Find the smallest prime number that is larger than 1, and is a factor of 129. 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 3.

Step 2:

Divide 129 by the smallest prime factor, in this case, 3

129 ÷ 3 = 43

3 becomes the first number in our prime factorization.

Step 3:

Repeat Steps 1 and 2, using 43 as the new focus. Find the smallest prime factor that isn’t 1, and divide 43 by that number. The smallest prime factor you pick for 43 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 129 are: 3, 43

Practice your factoring skills by exploring how to factor other numbers, like the ones below:

Factors of 39 - The factors of 39 are 1, 3, 13, 39

Factors of 121 - The factors of 121 are 1, 11, 121

Factors of 67 - The factors of 67 are 1, 67

Factors of 5 - The factors of 5 are 1, 5