What is the GCF of 490 and 1243?
The GCF of 490 and 1243 is 1.
Steps to find GCF
- Find the prime factorization of 490
490 = 2 × 5 × 7 × 7 - Find the prime factorization of 1243
1243 = 11 × 113 - To find the GCF, multiply all the prime factors common to both numbers:
Note that there are no common prime factors. - Therefore, GCF = 1 (since 1 is a factor of every number)
MathStep (Works offline)
Download our mobile app and learn how to find GCF of upto four numbers in your own time:
Android and iPhone/ iPad
Related
Find HCF of: 980 & 2486 1470 & 3729 2450 & 6215 3430 & 8701 980 & 1243 490 & 2486 1470 & 1243 490 & 3729 2450 & 1243 490 & 6215 3430 & 1243 490 & 8701
GCF Calculator
Enter two numbers separate by comma. To find GCF of more than two numbers, click here.
The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).