Q:
# In mathematical terms, what does "factor" mean?

**A factor is a number or expression that divides another number or expression evenly without a remainder.** For instance, two, four, five and 10 are factors of 20 because 20 can be divided by all those smaller numbers an exact number of times. Prime numbers are positive integers greater than one that have exactly two factors. A composite number has more than two factors.

Credit:
VikramRaghuvanshi
E+
Getty Images

Another way to define a factor is to multiply two or more numbers together to produce a larger number. All of those smaller numbers are factors of the product. A factor is also a divisor of a product, meaning the larger number is divided by the smaller an exact number of times.

Prime numbers have two factors, the prime number itself and one. Two is a prime number because two and one are the only numbers that multiply together to make two. Seven is a prime number because one and seven are the only numbers that produce seven as a multiple.

Factoring large whole numbers has a practical use in computer cryptography. Internet transactions are encrypted on the user and merchant end by large prime-number keys that complete the transactions. Without factoring of prime numbers, encryption codes over the Internet would not exist.

Learn more about Arithmetic-
Q:
## How do you find the factors of 60?

A: Find all the factors of 60 by identifying each integer that divides evenly into 60. Begin by finding two factors, such as four and 15. Then find the factor... Full Answer >Filed Under: -
Q:
## What are some examples of how to complete long division problems?

A: If the divisor is 7 and the dividend is 84, solve it by attempting to divide 8 by 7. The result is 1 with a remainder of 1. Therefore, the first digit of t... Full Answer >Filed Under: -
Q:
## What is a numerical expression?

A: Numerical expression is a mathematical equation that contains only numbers and operation symbols. It contains no variables, which are unknown numbers that ... Full Answer >Filed Under: -
Q:
## What is a rational expression?

A: A rational expression in mathematics is an expression that is the ratio of two polynomials. Most often, it is expressed as a fraction, such as (x^2 + 5)/(x... Full Answer >Filed Under: