Factors of 155 are the list of integers that we can split evenly into 155. There are overall 4 factors of 155 i.e. 1, 5, 31, 155 where 155 is the biggest factor. The Prime Factors of 155 are 5 × 31 and its Factors in Pairs are (1, 155), (5, 31).

• All Factors of 155: 1, 5, 31 and 155
• Negative Factors of 155: -1, -5, -31 and -155
• Prime Factors of 155: 5, 31
• Prime Factorization of 155: 5¹ × 31¹
• Sum of Factors of 155: 192

1.	What Are the Factors of 155?
2.	Factors of 155 by Prime Factorization
3.	Factors of 155 in Pairs
4.	FAQs on Factors of 155

Factors of 155 are pairs of those numbers whose products result in 155. These factors are either prime numbers or composite numbers.

How to Find the Factors of 155?

To find the factors of 155, we will have to find the list of numbers that would divide 155 without leaving any remainder.

• 155/5 = 31; therefore, 5 is a factor of 155 and 31 is also a factor of 155.
• 155/1 = 155; therefore, 1 is a factor of 155 and 155 is also a factor of 155.

Similarly we can find other factors. Hence, the factors of 155 are 1, 5, 31, 155.

☛ Also Check:

• Factors of 24 - The factors of 24 are 1, 2, 3, 4, 6, 8, 12, 24
• Factors of 38 - The factors of 38 are 1, 2, 19, 38
• Factors of 84 - The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
• Factors of 37 - The factors of 37 are 1, 37
• Factors of 121 - The factors of 121 are 1, 11, 121

The number 155 is composite and therefore it will have prime factors. Now let us learn how to calculate the prime factors of 155. The first step is to divide the number 155 with the smallest prime factor, here it is 5. We keep dividing until it gives a non-zero remainder.

• 155 ÷ 5 = 31

Further dividing 31 by 5 gives a non-zero remainder. So we stop the process and continue dividing the number 31 by the next smallest prime factor. We stop ultimately if the next prime factor doesn't exist or when we can't divide any further.

So, the prime factorization of 155 can be written as 5¹ × 31¹ where 5, 31 are prime.

Pair factors of 155 are the pairs of numbers that when multiplied give the product 155. The factors of 155 in pairs are:

• 1 × 155 = (1, 155)
• 5 × 31 = (5, 31)

Negative pair factors of 155 are:

• -1 × -155 = (-1, -155)
• -5 × -31 = (-5, -31)

NOTE: If (a, b) is a pair factor of a number then (b, a) is also a pair factor of that number.