Factors of 55
The factors of 55 are 1, 5, 11, 55. It has 4 factors.
Factors of 55
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 55 is a whole number that divides it with nothing left over. You only need to test the numbers up to ā55 ā 7.42; every one that divides gives a pair.
- 2
The factor pairs are listed in the table below. Together they give 4 factors.
- 3
Prime factorisation: keep dividing by the smallest prime that fits.
- 4
Add all the factors: 1 + 5 + 11 + 55 = 72. Without 55 itself that is 17, so 55 is a deficient number.
LaTeX source of the formulas on this page
\[ 55 = 5 \times 11 \]
Factor pairs of 55
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 55 | 1 Ć 55 = 55 |
| 5 | 11 | 5 Ć 11 = 55 |
Questions
What are the factors of 55?
The factors of 55 are 1, 5, 11, 55. It has 4 factors.
What are the prime factors of 55?
5, 11. As a product: 5 Ć 11.
How many factors does 55 have?
55 has 4 factors (2 factor pairs).
What is the sum of the factors of 55?
72.
Is 55 a prime number?
No. It is divisible by 5, so 55 = 5 Ć 11.