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