Factors: 1, 3, 5, 15

Factors of 15 in Pairs:

(1 x 15) (3 x 5) (5 x 3) (15 x 1)

Prime Factors of 15 : 3 * 5

Factors of 15 in Pairs:

(1 x 15) (3 x 5) (5 x 3) (15 x 1)

Prime Factors of 15 : 3 * 5

This list was generated by our Factor Calculator. It provides a list of the factors of 15 -
eg, the definitive answer to 15.
This could also be described as the divisors of 15.

These are the integers which can be evenly divided into 15; they can be expressed as either individual factors or as factor pairs. In this case, we present them both ways. This is mathematical decomposition of a particular number. While usually a positive integer, take note of the comments below about negative numbers.

A prime factorization is the result of factoring a number into a set of components which every member is a prime number. This is generally written by showing 15 as a product of its prime factors. For 15, this result would be:

15 = 3 x 5Yes! 15 is a composite number. It is the product of two positive numbers other than 1 and itself.

No! 15 is not a square number. The square root of this number (3.87) is not an integer.

This number has 4 factors: 1, 3, 5, 15

More specifically, shown as pairs...

(1*15) (3*5) (5*3) (15*1)

The greatest common factor of two numbers can be determined by comparing the prime factorization (factorisation in some texts) of the two numbers and taking the highest common prime factor. If there is no common factor, the gcf is 1. This is also referred to as a highest common factor and is part of the common prime factors of two numbers. It is the largest factor (largest number) the two numbers share as a prime factor. The least common factor (smallest number in common) of any pair of integers is 1.

We have a least common multiple calculator here The solution is the lowest common multiple of two numbers.

A factor tree is a graphic representation of the possible factors of a numbers and their sub-factors. It is designed to simplify factorization. It is created by finding the factors of a number, then finding the factors of the factors of a number. The process continues recursively until you've derived a bunch of prime factors, which is the the prime factorization of the original number. In constructing the tree, be sure to remember the second item in a factor pair.

To find the factors of -15, find all the positive factors (see above) and then duplicate them by adding a minus sign before each one (effectively multiplying them by -1). This addresses negative factors.

Yes.

Divisibility refers to a given integer being divisible for a given divisor. The divisibility rule are a shorthand system to determined what is or isn't divisible. This includes rules about odd number and even number factors. This example is intended to allow the student to estimate the status of a given number without computation.

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