GCF for 7, 8 and 9
"Greatest Common Factor of 3 Numbers" Calculator
What's the Greatest Common Factor (GCF) of 7, 8 and 9?
Answer
GCF of 7, 8 and 9 is
1
Common factors: 1
Only 1 divides all three: no prime is a factor of each of 7, 8 and 9.
The three numbers are pairwise coprime: no two of them share a factor other than 1.
7 — prime
8 = 23
9 = 32
| Prime | 7 | 8 | 9 | Lowest power |
|---|---|---|---|---|
| 2 | — | 23 | — | — |
| 3 | — | — | 32 | — |
| 7 | 7 | — | — | — |
— = 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 of 3 Numbers - Find the Least Common Multiple (LCM) of three numbers
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
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GCF Table
| 1st | 2nd | 3rd | GCF |
|---|---|---|---|
| 1 | 7 | 8 | 1 |
| 2 | 7 | 8 | 1 |
| 3 | 7 | 8 | 1 |
| 4 | 7 | 8 | 1 |
| 5 | 7 | 8 | 1 |
| 6 | 7 | 8 | 1 |
| 7 | 7 | 8 | 1 |
| 7 | 8 | 8 | 1 |
| 7 | 8 | 9 | 1 |
| 7 | 8 | 10 | 1 |
| 7 | 8 | 11 | 1 |
| 7 | 8 | 12 | 1 |
| 7 | 8 | 13 | 1 |
| 7 | 8 | 14 | 1 |
| 7 | 8 | 15 | 1 |
| 7 | 8 | 16 | 1 |
| 7 | 8 | 17 | 1 |
| 7 | 8 | 18 | 1 |
| 7 | 8 | 19 | 1 |
| 7 | 8 | 20 | 1 |
| 7 | 8 | 21 | 1 |
| 7 | 8 | 22 | 1 |
| 7 | 8 | 23 | 1 |
| 7 | 8 | 24 | 1 |
| 7 | 8 | 25 | 1 |
| 7 | 8 | 26 | 1 |
| 7 | 8 | 27 | 1 |
| 7 | 8 | 28 | 1 |
| 7 | 8 | 29 | 1 |
| 7 | 8 | 30 | 1 |