What is the GCF of 561 and 1388?
The GCF of 561 and 1388 is 1.
Steps to find GCF
- Find the prime factorization of 561
561 = 3 × 11 × 17 - Find the prime factorization of 1388
1388 = 2 × 2 × 347 - 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: 1122 & 2776 1683 & 4164 2805 & 6940 3927 & 9716 1122 & 1388 561 & 2776 1683 & 1388 561 & 4164 2805 & 1388 561 & 6940 3927 & 1388 561 & 9716
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).