Factors of 121
The factors of 121 are 1, 11, 121. It has 3 factors.
Factors of 121
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A factor of 121 is a whole number that divides it with nothing left over. You only need to test the numbers up to √121 ≈ 11.00; 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 + 11 + 121 = 133. Without 121 itself that is 12, so 121 is a deficient number.
LaTeX source of the formulas on this page
\[ 121 = 11^{2} \]Factor pairs of 121
| Factor | Pairs with | Product |
|---|---|---|
| 1 | 121 | 1 × 121 = 121 |
| 11 | 11 | 11 × 11 = 121 |
Questions
What are the factors of 121?
The factors of 121 are 1, 11, 121. It has 3 factors.
What are the prime factors of 121?
11. As a product: .
How many factors does 121 have?
121 has 3 factors (2 factor pairs, one of them 11 × 11).
What is the sum of the factors of 121?
133.
Is 121 a prime number?
No. It is divisible by 11, so 121 = 11 × 11.