1,3,7,21
1,19
1,2,5,10,25,50
38
21 and 50 share no common factors aside from 1.
21 has the most factors of the four numbers. 19 has 2 factors (1 and 19) 21 has 4 factors (1, 3, 7, 21) 23 has 2 factors (1, 23) 25 has 3 factors (1, 5, 25)
Out of that group, 21 has the most factors.
19 is a prime number. Its only factors are 1 and 19. 21 is a composite number. Its factors are 1, 3, 7, and 21. 23 is a prime number. Its only factors are 1 and 23.
which of the numbers 19 21 23 and 25 has the most factors
21
The common factors of 38 and 50 are: 1 and 2
21 has the most factors of the given numbers.
Both 1 and 19 can divide into both 19 and 57.
21 does.
The greatest common factor of 21 and 39 is 3