Factors of 143
The factors of 143 are 1, 11, 13, and 143. In total, 143 has 4 factors. Its prime factorization is 11 × 13, and the sum of all its factors is 168.
All factors of 143
Here are all 4 factors of 143, listed from smallest to largest.
Factor pairs of 143
These 2 pairs of whole numbers each multiply to give 143.
Prime factorization of 143
Dividing 143 by the smallest prime at each step gives its prime factorization:
The distinct prime factors of 143 are 11, 13. To factorize any other number, use the prime factorization calculator.
Factor tree of 143
A factor tree shows the same prime factorization visually. Each composite branch splits until every endpoint is a prime number.
Properties of 143
| Number of factors | 4 |
|---|---|
| Sum of factors | 168 |
| Sum of proper factors | 25 |
| Prime factorization | 11 × 13 |
| Prime or composite? | Composite |
| Even or odd? | Odd |
| Perfect square? | No |
| Perfect cube? | No |
| Classification | Deficient |
What makes 143 interesting
- 143 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.
- 143 is a deficient number: its proper factors sum to 25, which is 118 less than 143 itself.
How to find the factors of 143 yourself
Divide 143 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 √143 ≈ 11.96, because every factor above that pairs with one below it.
Reading both columns gives every factor: 1, 11, 13, 143. The factor calculator does this automatically for any number.
Related numbers
Numbers mathematically connected to 143.
Frequently asked questions about 143
What are the factors of 143?
Is 143 a prime number?
What is the prime factorization of 143?
What two numbers multiply to give 143?
What is the sum of the factors of 143?
Is 143 a perfect square?
What is the largest factor of 143 other than itself?
How many factors does 143 have?
Explore more
Try another number in the factor calculator, break 143 down further with the prime factorization calculator, or compare 143 with another number using the GCF calculator and LCM calculator. For divisor counts and sums, see the divisor calculator.