Factors of 133
The factors of 133 are 1, 7, 19, and 133. In total, 133 has 4 factors. Its prime factorization is 7 × 19, and the sum of all its factors is 160.
All factors of 133
Here are all 4 factors of 133, listed from smallest to largest.
Factor pairs of 133
These 2 pairs of whole numbers each multiply to give 133.
Prime factorization of 133
Dividing 133 by the smallest prime at each step gives its prime factorization:
The distinct prime factors of 133 are 7, 19. To factorize any other number, use the prime factorization calculator.
Factor tree of 133
A factor tree shows the same prime factorization visually. Each composite branch splits until every endpoint is a prime number.
Properties of 133
| Number of factors | 4 |
|---|---|
| Sum of factors | 160 |
| Sum of proper factors | 27 |
| Prime factorization | 7 × 19 |
| Prime or composite? | Composite |
| Even or odd? | Odd |
| Perfect square? | No |
| Perfect cube? | No |
| Classification | Deficient |
What makes 133 interesting
- 133 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.
- 133 is a deficient number: its proper factors sum to 27, which is 106 less than 133 itself.
How to find the factors of 133 yourself
Divide 133 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 √133 ≈ 11.53, because every factor above that pairs with one below it.
Reading both columns gives every factor: 1, 7, 19, 133. The factor calculator does this automatically for any number.
Related numbers
Numbers mathematically connected to 133.
Frequently asked questions about 133
What are the factors of 133?
Is 133 a prime number?
What is the prime factorization of 133?
What two numbers multiply to give 133?
What is the sum of the factors of 133?
Is 133 a perfect square?
What is the largest factor of 133 other than itself?
How many factors does 133 have?
Explore more
Try another number in the factor calculator, break 133 down further with the prime factorization calculator, or compare 133 with another number using the GCF calculator and LCM calculator. For divisor counts and sums, see the divisor calculator.