Greatest Common Factor of 21, 407, 145

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

• Greatest Common Factor of 21, 407, 145 by common division method
• Greatest Common Factor of 21, 407, 145 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 21

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

1,3,7,21

Factors of 407

List of positive integer factors of 407 that divides 407 without a remainder.

1,11,37,407

Factors of 145

List of positive integer factors of 145 that divides 145 without a remainder.

1,5,29,145

Greatest Common Factor

We found the factors 21,407,145 . The biggest common factor number is the GCF number.
So the greatest common factor 21,407,145 is 1.

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

• GCF of 39, 587, 546
• GCF of 45, 867, 605
• GCF of 43, 469, 463
• GCF of 75, 135, 925
• GCF of 85, 486, 720

1. What is the GCF of 21, 407, 145?

Answer: GCF of 21, 407, 145 is 1.

2. How to Find the GCF of 21, 407, 145

Answer: Greatest Common Factor(GCF) of 21, 407, 145 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 407, 145) = 1.