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What is the greatest common factor of 19 and 21?
A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common. One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them. The factors of 19 are 1 and 19. The factors of 21 are 1, 3, 7, and 21. The only common factor is 1. Therefore, the greatest common factor is 1, which means the numbers are relatively prime.
What are the common factors of 21 and 51?
The common factors of 21 and 51 are: 1 and 3
What are the common factors of 21 and 133?
The common factors of 21 and 133 are the numbers that can evenly divide both 21 and 133 without leaving a remainder. The factors of 21 are 1, 3, 7, and 21, while the factors of 133 are 1, 7, 19, and 133. Therefore, the only common factor of 21 and 133 is 1.
What are the common factors of 21 and 70?
The factors of 21 are 1,3,7, and 21. The factors of 70 are 1,2,5,7,14,35, and 70 The common factors of 21 and 70 are 1 and 7.
The common prime factors of 19 and 90 are?
19 and 90 have no common prime factors.
