Factors of 10
Every whole number that divides 10 exactly, the factor pairs, and how to find them yourself.
The answer
The factors of 10 are 1, 2, 5 and 10.
Factor pairs of 10
| Pair | Makes |
|---|---|
| 1 × 10 | 10 |
| 2 × 5 | 10 |
Prime factors of 10
- Prime factorisation
- 10 = 2 × 5
- Is 10 prime?
- No. It has 4 factors, not just 1 and 10.
- Is 10 a square number?
- No. 3 × 3 = 9 and 4 × 4 = 16, so 10 falls between two square numbers.
How to find the factors of 10
10 is even, so 2 is sure to be a factor. It ends in 0, so 5 is a factor. Work up from 1 to 3, and write down both numbers in every pair you find.
- 10 ÷ 1 = 10, so 1 × 10 is a pair.
- 10 ÷ 2 = 5, so 2 × 5 is a pair.
- 3 does not go into 10 exactly.
Stop at 4: 4 × 4 = 16, which is more than 10. The next pair you would find is 5 × 2, which is 2 × 5 turned round, so you already have every pair.
10 in the times tables
2 × 5 = 10. Practise the 2 times table and 5 times table.
More numbers
Check whether 10 is prime.
Questions parents ask
What is the largest factor of 10, apart from 10 itself?
5. Divide 10 by its smallest factor above 1, which is 2: 10 ÷ 2 = 5.
What do the factors of 10 add up to?
18. Leaving out 10 itself, they add up to 8, which is less than 10, so 10 is called a deficient number.
Which number after 10 has the same number of factors?
14. Like 10, it has exactly 4 factors.
Continue your number practice
Explore the diagnostic for another set of practice questions.