Factors of 108 are the integers that can divide the original number evenly.  There are a total of twelve factors of 108, they are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54 and 108.

The pair factors of 108 are the numbers that are multiplied in pairs resulting in an original number. The factors of 108 can be positive or negative. The pair factors of 108 can also be represented in the positive as well as in the negative pair. For example, the factor pair of 108 can be (1, 108) or (-1, -108). If we multiply the negative pair factors of 108, then it results in 108. In this article, we are going to learn the factors of 108 and also get to know about the positive and negative pair factors of 108, and the prime factorization of 108 and solved examples.

What are the Factors of 108?

The factors of 108 are the numbers that divide 108 exactly without leaving a remainder. As the number 108 is an even composite number, it has many factors other than 1 and 108. Hence, the factors of 108 are 1, 2, 3 , 4, 6, 9, 12, 18, 27, 36, 54, and 108. 

Pair Factors of 108

A pair of numbers that are multiplied together resulting in an original number 108 is called the pair factors of 108. As discussed earlier, the pair factors of 108 can be represented in positive as well as in negative form. Thus, the positive and negative pair factors of 108 are given below:

Positive Pair Factors of 108:

Negative Pair Factors of 108:

How to Find Factors of 108?

We can simply evaluate the factors of 108 by the basic division method. In the division method, the factors of 108 are found by dividing 108 by different consecutive integers. If the integers divide 108 exactly and leave the remainder 0, then the integers are the factors of 108. Here, we will discuss how to find the factors of 108 using the division method.

• 108/1 = 108 (Factor = 1 and Remainder = 0)
• 108/2 = 54 (Factor = 2 and Remainder = 0)
• 108/3 = 36 (Factor = 3 and Remainder = 0)
• 108/4 = 27 (Factor = 4 and Remainder = 0)
• 108/6 = 18 (Factor = 6 and Remainder = 0)
• 108/9 = 12 (Factor = 9 and Remainder = 0)
• 108/12 = 9 (Factor = 12 and Remainder = 0)
• 108/18 = 6 (Factor = 18 and Remainder = 0)
• 108/27 = 4 (Factor = 27 and Remainder = 0)
• 108/36 = 3 (Factor = 36 and Remainder = 0)
• 108/54 = 2 (Factor = 54 and Remainder = 0)
• 108/108 = 1 (Factor = 108 and Remainder = 0)

If we divide 108 by any numbers other than 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, and 108, it leaves a remainder. Hence, the factors of 108 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, and 108.

Prime Factorization of 108

In the prime factorization of 108, the number 108 is written as the product of its prime factors. Now, let us discuss how to find the prime factors of 108.

• Divide the number 108 by the smallest prime number, i.e., 2. 108/2 = 52
• Again divide 52 by 2. 52/2 = 27
• Now, 27 is an odd number and cannot be divided by 2. Divide 27 by the next prime number, i.e.,3. 27/3 = 9
• Divide 9 by 3. 9/3 = 3
• Divide 3 by 3. 3/3 =1
• We cannot proceed further, since 1 is not divisible by any prime number

Thus, the prime factorization of 108 is  2 × 2 × 3 × 3 × 3 or 2² × 3³.

Factor Tree of 108

Important Facts to Remember

• Factors of 108: 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108
• Prime factors of 108: 2 and 3
• Prime factorisation of 108 = 2² × 3³
• Sum of factors of 108 = 280

Related Articles

• Factors of a Number
• Prime Numbers
• What is Prime Factorisation?

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Solved Examples

Example 1:

Find the common factors of 108 and 107.

Solution:

The factors of 108 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, and 108.

The factors of 107 are 1 and 107.

As 107 is a prime number, the common factor of 108 and 107 is 1.

Example 2:

Find the common factors of 108 and 109.

Solution:

Factors of 108 = 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, and 108.

Factors of 109 = 1 and 109.

As 109 is a prime number, the common factor of 108 and 109 is 1 only.

Example 3:

Find the common factors of 108 and 54.

Solution: 

The factors of 108 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, and 108.

The factors of 54 are 1, 2, 3, 6, 9, 18, 27 and 54.

Hence, the common factors of 108 and 54 are 1, 2, 3, 6, 9, 18, 27 and 54.

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