what is the greatest common factor of the numbers 21?
430631
Greatest common factor (GCF) of 21 and 28 is 7. We will now calculate the prime factors of 21 and 28, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 21 and 28.
619783
Greatest Common Factor of 8 and 21. Greatest common factor (GCF) of 8 and 21 is 1.
143120
['The prime factorization of 56 is: 2 x 2 x 2 x 7.', 'The prime factorization of 21 is: 3 x 7.', 'The prime factors and multiplicities 56 and 21 have in common are: 7.', '7 is the gcf of 56 and 21.', 'gcf(56,21) = 7.']
262201
The greatest common factor (GCF) of a set of numbers is the largest factor that all the numbers share. For example, 12, 20, and 24 have two common factors: 2 and 4. The largest is 4, so we say that the GCF of 12, 20, and 24 is 4.
1117634
The prime factors and multiplicities 21 and 42 have in common are: 3 x 7. 3 x 7 is the gcf of 21 and 42. gcf(21,42) = 21.
817828
We found the factors and prime factorization of 16 and 21. The biggest common factor number is the GCF number. So the greatest common factor 16 and 21 is 1.
65502
The two numbers (12 and 16) share common factors (1, 2, 4). The greatest of these is 4 and that is the greatest common factor.
1444365
The prime factorization of 54 is: 2 x 3 x 3 x 3. The prime factors and multiplicities 21 and 54 have in common are: 3. 3 is the gcf of 21 and 54. gcf(21,54) = 3.
781863
The prime factorization of 49 is: 7 x 7. The prime factors and multiplicities 21 and 49 have in common are: 7. 7 is the gcf of 21 and 49. gcf(21,49) = 7.
1413425
We found the factors and prime factorization of 6 and 21. The biggest common factor number is the GCF number. So the greatest common factor 6 and 21 is 3.
66045
Sometimes, two numbers do not have any prime factors in common. For example, the prime factorization of 40 is 2×2×2×5 and the prime factorization of 21 is 3×7. Since 40 and 21 have no common prime factors, they are said to be relatively prime, and their greatest common factor is 1.
805689
We found the factors and prime factorization of 3 and 13. The biggest common factor number is the GCF number. So the greatest common factor 3 and 13 is 1.
1205352
We found the factors and prime factorization of 64 and 72. The biggest common factor number is the GCF number. So the greatest common factor 64 and 72 is 8.
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['The prime factorization of 18 is: 2 x 3 x 3.', 'The prime factorization of 21 is: 3 x 7.', 'The prime factors and multiplicities 18 and 21 have in common are: 3.', '3 is the gcf of 18 and 21.', 'gcf(18,21) = 3.']
911031
Greatest common factor (GCF) of 24 and 32 is 8. We will now calculate the prime factors of 24 and 32, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 24 and 32.
77188
We found the factors and prime factorization of 14 and 21. The biggest common factor number is the GCF number. So the greatest common factor 14 and 21 is 7.
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We may write the solution symbolically as GCF(20, 16) = 4. This says "the greatest common factor of 20 and 16 is 4."