Greatest Common Factor of 991, 660

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

• Greatest Common Factor of 991, 660 by common division method
• Greatest Common Factor of 991, 660 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 991

List of positive integer factors of 991 that divides 991 without a remainder.

1,991

Factors of 660

List of positive integer factors of 660 that divides 660 without a remainder.

1,2,3,4,5,6,10,11,12,15,20,22,30,33,44,55,60,66,110,132,165,220,330,660

Greatest Common Factor

We found the factors 991,660 . The biggest common factor number is the GCF number.
So the greatest common factor 991,660 is 1.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 172, 666
• GCF of 933, 148
• GCF of 991, 508
• GCF of 491, 762
• GCF of 986, 316

1. What is the GCF of 991, 660?

Answer: GCF of 991, 660 is 1.

2. How to Find the GCF of 991, 660

Answer: Greatest Common Factor(GCF) of 991, 660 = 1

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(991, 660) = 1.