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Q: Which of the number 19 21 23 and 25 has the most factors?

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21

21

Out of that group, 21 has the most factors.

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.

21 has the most factors of the given numbers.

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

21 does.

It is: 21 which has four factors of 1 3 7 and 21

The number 21 would be the answer. 19 and 23 only have two factors, 1 and themselves, as they are prime numbers. 25 only has 1, 25 and 5. 21 has 1, 21, 3 and 7 for 4 possible factors.

which of the numbers 19 21 23 and 25 has the most factors

12

Factors of 19: 1, 19.Factors of 21: 1, 3, 7, 21.GCF (19, 21) = 1

21

21 does.

3, 7, and 19 have only two factors, 1 and itself. They are prime numbers. 21 has more than 2 factors: 1, 3, 7, and 21. It is a composite number.

12 and 18

24

12

If 21 is a factor of a number, then the factors of 21 must also be factors. So 3 and 7

The factors of 21 are :1,3,7,21

The number 1 is neither prime nor composite. The numbers 25, 16, 21, and 27 are divisible by factors that are not one or the number itself. 19 is the only one that has only 1 and itself as factors, so it is a prime number.

21/19 = 12/19

4 factors they are 1,3,7 and 21