Factors of 19
The factors of 19 are 1, 19. It has 2 factors.
Factors of 19
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 19 is a whole number that divides it with nothing left over. You only need to test the numbers up to √19 ≈ 4.36; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 2 factors.
- 3
19 has no factors besides 1 and itself, so it is a prime number.
- 4
Add all the factors: 1 + 19 = 20. Without 19 itself that is 1, so 19 is a deficient number.
LaTeX source of the formulas on this page
\[ 19 = 19 \]
Factor pairs of 19
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 19 | 1 × 19 = 19 |
Questions
What are the factors of 19?
The factors of 19 are 1, 19. It has 2 factors.
What are the prime factors of 19?
19. As a product: 19.
How many factors does 19 have?
19 has 2 factors (1 factor pair).
What is the sum of the factors of 19?
20.
Is 19 a prime number?
Yes. Its only factors are 1 and 19.