Write a number as a product of its prime factors To be able to find factors and write a number as a product of prime factors, having knowledge of powers and indices is useful. Remember: To find all ...

The first factor pair is always 1 and the number itself. Consider whether the number is divisible, in turn, by 2, 3, 4, etc. Divide to find the other factor of the pair. All the factors are found when ...

A prime number is a number that is only divisible by one and itself, which is essentially saying that it has no divisor. That takes half of all possible numbers off the table right away (the evens), ...

What are the prime factors, or multipliers, for the number 15? Most grade school students know the answer -- 3 and 5 -- by memory. A larger number, such as 91, may take some pen and paper. An even ...