GCF (HCF) of 11 and 19
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What is the Greatest Common Divisor of 11 and 19?
Answer
GCF (HCF) of 11 and 19 is
1
Common factors: 1
Only 1 divides both: 11 and 19 share no prime factor.
Such numbers are called coprime (relatively prime); their LCM is just the product: 11 × 19 = 209.
11 — prime
19 — prime
| Prime | 11 | 19 | Lowest power |
|---|---|---|---|
| 11 | 11 | — | — |
| 19 | — | 19 | — |
— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.
GCF = 1
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See Also
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
- Greatest Common Factor of 3 Numbers - Find the Greatest Common Factor (GCF) of three numbers
- Least Common Multiple of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
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