Factors of 13
Every whole number that divides 13 exactly, the factor pairs, and how to find them yourself.
The answer
The factors of 13 are 1 and 13. 13 is a prime number.
Factor pairs of 13
| Pair | Makes |
|---|---|
| 1 × 13 | 13 |
Prime factors of 13
- Prime factorisation
- 13 = 13
- Is 13 prime?
- Yes. It is the 6th prime number.
- Is 13 a square number?
- No. 3 × 3 = 9 and 4 × 4 = 16, so 13 falls between two square numbers.
How to find the factors of 13
13 is prime, so the only pair you will find is 1 × 13. Work up from 1 to 3, and write down both numbers in every pair you find.
- 13 ÷ 1 = 13, so 1 × 13 is a pair.
- 2 does not go into 13 exactly.
- 3 does not go into 13 exactly.
Stop at 4: 4 × 4 = 16, which is more than 13. The next pair you would find is 13 × 1, which is 1 × 13 turned round, so you already have every pair.
More numbers
Check whether 13 is prime.
Questions parents ask
What is the largest factor of 13, apart from 13 itself?
1. 13 is prime, so apart from 13 itself its only factor is 1.
What do the factors of 13 add up to?
14. Leaving out 13 itself, they add up to 1, which is less than 13, so 13 is called a deficient number.
Which number after 13 has the same number of factors?
17. Like 13, it has exactly 2 factors.
Continue your number practice
Explore the diagnostic for another set of practice questions.