Greatest Common Factor of 42, 25, 80, 661

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

• Greatest Common Factor of 42, 25, 80, 661 by common division method
• Greatest Common Factor of 42, 25, 80, 661 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

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

Factors of 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 25

List of positive integer factors of 25 that divides 25 without a remainder.

1,5,25

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Factors of 661

List of positive integer factors of 661 that divides 661 without a remainder.

1,661

Greatest Common Factor

We found the factors 42,25,80,661 . The biggest common factor number is the GCF number.
So the greatest common factor 42,25,80,661 is 1.

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

• GCF of 56, 22, 36, 555
• GCF of 71, 99, 60, 126
• GCF of 41, 42, 72, 718
• GCF of 43, 56, 58, 791
• GCF of 83, 41, 67, 377

1. What is the GCF of 42, 25, 80, 661?

Answer: GCF of 42, 25, 80, 661 is 1.

2. How to Find the GCF of 42, 25, 80, 661

Answer: Greatest Common Factor(GCF) of 42, 25, 80, 661 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 25, 80, 661) = 1.