Greatest Common Factor of 144, 139, 155, 21

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

• Greatest Common Factor of 144, 139, 155, 21 by common division method
• Greatest Common Factor of 144, 139, 155, 21 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 144

List of positive integer factors of 144 that divides 144 without a remainder.

1,2,3,4,6,8,9,12,16,18,24,36,48,72,144

Factors of 139

List of positive integer factors of 139 that divides 139 without a remainder.

1,139

Factors of 155

List of positive integer factors of 155 that divides 155 without a remainder.

1,5,31,155

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Greatest Common Factor

We found the factors 144,139,155,21 . The biggest common factor number is the GCF number.
So the greatest common factor 144,139,155,21 is 1.

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

• GCF of 297, 697, 404, 73
• GCF of 196, 221, 360, 70
• GCF of 353, 163, 726, 43
• GCF of 553, 181, 696, 20
• GCF of 437, 680, 931, 94

1. What is the GCF of 144, 139, 155, 21?

Answer: GCF of 144, 139, 155, 21 is 1.

2. How to Find the GCF of 144, 139, 155, 21

Answer: Greatest Common Factor(GCF) of 144, 139, 155, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(144, 139, 155, 21) = 1.