GCF for 70 and 165
What is the Greatest Common Divisor of 70 and 165?
Answer
(Five)
Finding GCF for 70 and 165 using all factors (divisors) listing
The first method to find GCF for numbers 70 and 165 is to list all factors for both numbers and pick the highest common one:
All factors of 70: 1, 2, 5, 7, 10, 14, 35, 70
All factors of 165: 1, 3, 5, 11, 15, 33, 55, 165
So the Greatest Common Factor for 70 and 165 is 5
Finding GCF for 70 and 165 by Prime Factorization
The second method to find GCF for numbers 70 and 165 is to list all Prime Factors for both numbers and multiply the common ones:
All Prime Factors of 70: 2, 5, 7
All Prime Factors of 165: 3, 5, 11
As we can see there is only one Prime Factor common to both numbers. It is 5
So 5 is the Greatest Common Factor of 70 and 165
Related Calculations
See Also
- Least Common Multiple - Find the Least Common Multiple (LCM) of two numbers
<a href="https://calculat.io/en/number/greatest-common-factor-of/70--165">What is the GCF of 70 and 165 - Calculatio</a>
GCF Table
| Number 1 | Number 2 | GCF |
|---|---|---|
| 55 | 165 | 55 |
| 56 | 165 | 1 |
| 57 | 165 | 3 |
| 58 | 165 | 1 |
| 59 | 165 | 1 |
| 60 | 165 | 15 |
| 61 | 165 | 1 |
| 62 | 165 | 1 |
| 63 | 165 | 3 |
| 64 | 165 | 1 |
| 65 | 165 | 5 |
| 66 | 165 | 33 |
| 67 | 165 | 1 |
| 68 | 165 | 1 |
| 69 | 165 | 3 |
| 70 | 165 | 5 |
| 71 | 165 | 1 |
| 72 | 165 | 3 |
| 73 | 165 | 1 |
| 74 | 165 | 1 |
| 75 | 165 | 15 |
| 76 | 165 | 1 |
| 77 | 165 | 11 |
| 78 | 165 | 3 |
| 79 | 165 | 1 |
| 80 | 165 | 5 |
| 81 | 165 | 3 |
| 82 | 165 | 1 |
| 83 | 165 | 1 |
| 84 | 165 | 3 |
About "Greatest Common Factor" Calculator
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder.