Factors of 4
The factors of 4 are 1, 2, 4. It has 3 factors.
Factors of 4
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 4 is a whole number that divides it with nothing left over. You only need to test the numbers up to √4 ≈ 2.00; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 3 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 2 + 4 = 7. Without 4 itself that is 3, so 4 is a deficient number.
LaTeX source of the formulas on this page
\[ 4 = 2^{2} \]Factor pairs of 4
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 4 | 1 × 4 = 4 |
| 2 | 2 | 2 × 2 = 4 |
Questions
What are the factors of 4?
The factors of 4 are 1, 2, 4. It has 3 factors.
What are the prime factors of 4?
2. As a product: .
How many factors does 4 have?
4 has 3 factors (2 factor pairs, one of them 2 × 2).
What is the sum of the factors of 4?
7.
Is 4 a prime number?
No. It is divisible by 2, so 4 = 2 × 2.