GCF for 70 and 245

What is the Greatest common Divisor of 70 and 245?

Answer: GCF of 70 and 245 is 35

(Thirty-five)

Finding GCF for 70 and 245 using all factors (divisors) listing

The first method to find GCF for numbers 70 and 245 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 245: 1, 5, 7, 35, 49, 245

So the Greatest Common Factor for 70 and 245 is 35

Finding GCF for 70 and 245 by Prime Factorization

The second method to find GCF for numbers 70 and 245 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 245: 5, 7, 7

As we can see there are Prime Factors common to both numbers: 5, 7

Now we need to multiply them to find GCF: 5 × 7 = 35

Related Calculations

GCF Table

Number 1Number 2GCF
552455
562457
572451
582451
592451
602455
612451
622451
632457
642451
652455
662451
672451
682451
692451
70245
712451
722451
732451
742451
752455
762451
772457
782451
792451
802455
812451
822451
832451
842457

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest common Divisor of 70 and 245? (The answer is: 35). Select the first number (e.g. '70') and the second number (e.g. '245'). After that hit the 'Calculate' button.
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

FAQ

What is the Greatest common Divisor of 70 and 245?

GCF of 70 and 245 is 35