What is the Greatest Common Factor of 45 and 7?
Greatest common factor (GCF) of 45 and 7 is 1.
GCF(45,7) = 1
We will now calculate the prime factors of 45 and 7, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 45 and 7.
How to find the GCF of 45 and 7?
We will first find the prime factorization of 45 and 7. After we will calculate the factors of 45 and 7 and find the biggest common factor number .
Step-1: Prime Factorization of 45
Prime factors of 45 are 3, 5. Prime factorization of 45 in exponential form is:
45 = 32 × 51
Step-2: Prime Factorization of 7
Prime factors of 7 are 7. Prime factorization of 7 in exponential form is:
7 = 71
Step-3: Factors of 45
List of positive integer factors of 45 that divides 45 without a remainder.
1, 3, 5, 9, 15
Step-4: Factors of 7
List of positive integer factors of 7 that divides 45 without a remainder.
1
Final Step: Biggest Common Factor Number
We found the factors and prime factorization of 45 and 7. The biggest common factor number is the GCF number.
So the greatest common factor 45 and 7 is 1.
Also check out the Least Common Multiple of 45 and 7