There is only one and it is 1
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.
The common factors of 21 and 51 are: 1 and 3
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.
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.
19 and 90 have no common prime factors.
Both 1 and 19 can divide into both 19 and 57.
The only common factor is 1.
The greatest common factor of 21 and 39 is 3
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.
The common factors are: 1, 19
The factors of 19 are: 1, 19 The factors of 76 are: 1, 2, 4, 19, 38, 76 The common factors are: 1, 19 The Greatest Common Factor: 19
The common factors of 21 and 51 are: 1 and 3
The common factors of 21 42 and 84 are 21
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.
The common factors of 21 and 63 are 1, 3, 7, and 21
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 least common multiple of 21 , 19 = 399