Factors of 25

The factors of a integer are the integers that go into the larger number an even number of times. For example, 5 is a factor of 15 because 5 goes in to 15 evenly 3 times.

But you're here for the factors of 25. The factors of 25 are 1, 5, 25. You can divide 25 by each of these numbers and get an integer value, and that value is also a factor of 25. Depending on who you talk to 1 and 25 should not be included in the factor list since all numbers are divisible by 1 and itself. But we're including them here.

$$ \LARGE \begin{aligned} 25 \div 1 &= 25 \\ 25 \div 5 &= 5 \\ 25 \div 25 &= 1 \\ \end{aligned} $$

And notice that as we go down the list and divide 25 by each of its factors, the answer is another factor.

How many factors of 25

Looking at our lists above we can see that 25 has 3 positive factors.

Negative Factors of 25

We've already seen that the factors for 25 are \(\Large 1, 5, 25 \). But if you remember back to math class you'll know that if you multiply two negative numbers together you'll get a positive, and the same works with factors. So this set of factors can also be displayed as negative factors, in this case \(\Large -1, -5, -25 \).

Is 25 prime?

A prime number is one that only has two factors, 1 and itself.

No, 25 is not a prime number because it has more factors other than 1 and itself.