Factors of 161 are the list of integers that can be evenly divided into 161. There are overall 4 factors of 161 among which 161 is the biggest factor and 1, 7, 23, 161 are positive factors. The sum of all factors of 161 is 192 and its factors in Pairs are (1, 161), (7, 23).

• All Factors of 161: 1, 7, 23 and 161
• Negative Factors of 161: -1, -7, -23 and -161
• Prime Factors of 161: 7, 23
• Prime Factorization of 161: 7¹ × 23¹
• Sum of Factors of 161: 192

1.	What Are the Factors of 161?
2.	Factors of 161 by Prime Factorization
3.	Factors of 161 in Pairs
4.	FAQs on Factors of 161

Factors of 161 are pairs of those numbers whose products result in 161. These factors are either prime numbers or composite numbers.

How to Find the Factors of 161?

To find the factors of 161, we will have to find the list of numbers that would divide 161 without leaving any remainder.

• 161/7 = 23; therefore, 7 is a factor of 161 and 23 is also a factor of 161.
• 161/1 = 161; therefore, 1 is a factor of 161 and 161 is also a factor of 161.

Similarly we can find other factors. Hence, the factors of 161 are 1, 7, 23, 161.

☛ Also Check:

• Factors of 72 - The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
• Factors of 11 - The factors of 11 are 1, 11
• Factors of 75 - The factors of 75 are 1, 3, 5, 15, 25, 75
• Factors of 91 - The factors of 91 are 1, 7, 13, 91
• Factors of 99 - The factors of 99 are 1, 3, 9, 11, 33, 99

The number 161 is composite and therefore it will have prime factors. Now let us learn how to calculate the prime factors of 161. The first step is to divide the number 161 with the smallest prime factor, here it is 7. We keep dividing until it gives a non-zero remainder.

• 161 ÷ 7 = 23

Further dividing 23 by 7 gives a non-zero remainder. So we stop the process and continue dividing the number 23 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 161 can be written as 7¹ × 23¹ where 7, 23 are prime.

Pair factors of 161 are the pairs of numbers that when multiplied give the product 161. The factors of 161 in pairs are:

• 1 × 161 = (1, 161)
• 7 × 23 = (7, 23)

Negative pair factors of 161 are:

• -1 × -161 = (-1, -161)
• -7 × -23 = (-7, -23)

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