Factors of 291
The factors of 291 are 1, 3, 97, and 291. In total, 291 has 4 factors. Its prime factorization is 3 × 97, and the sum of all its factors is 392.
All factors of 291
Here are all 4 factors of 291, listed from smallest to largest.
Factor pairs of 291
These 2 pairs of whole numbers each multiply to give 291.
Prime factorization of 291
Dividing 291 by the smallest prime at each step gives its prime factorization:
The distinct prime factors of 291 are 3, 97. To factorize any other number, use the prime factorization calculator.
Factor tree of 291
A factor tree shows the same prime factorization visually. Each composite branch splits until every endpoint is a prime number.
Properties of 291
| Number of factors | 4 |
|---|---|
| Sum of factors | 392 |
| Sum of proper factors | 101 |
| Prime factorization | 3 × 97 |
| Prime or composite? | Composite |
| Even or odd? | Odd |
| Perfect square? | No |
| Perfect cube? | No |
| Classification | Deficient |
What makes 291 interesting
- 291 is a composite number, meaning it has more than two factors. It can be written as a product of smaller whole numbers in 2 different ways.
- 291 is a deficient number: its proper factors sum to 101, which is 190 less than 291 itself.
How to find the factors of 291 yourself
Divide 291 by each whole number starting from 1. Whenever the division leaves no remainder, both the divisor and the quotient are factors. You only need to test up to √291 ≈ 17.06, because every factor above that pairs with one below it.
Reading both columns gives every factor: 1, 3, 97, 291. The factor calculator does this automatically for any number.
Related numbers
Numbers mathematically connected to 291.
Frequently asked questions about 291
What are the factors of 291?
Is 291 a prime number?
What is the prime factorization of 291?
What two numbers multiply to give 291?
What is the sum of the factors of 291?
Is 291 a perfect square?
What is the largest factor of 291 other than itself?
How many factors does 291 have?
Explore more
Try another number in the factor calculator, break 291 down further with the prime factorization calculator, or compare 291 with another number using the GCF calculator and LCM calculator. For divisor counts and sums, see the divisor calculator.