# What are the common factors of 21 and 60?

Table of Contents

## What are the common factors of 21 and 60?

For 21 and 60 those factors look like this:

- Factors for 21: 1, 3, 7, and 21.
- Factors for 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.

## What are common factors of 60?

The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 and 60.

**What are the factors of 21 28?**

The factors of 21 and 28 are 1, 3, 7, 21 and 1, 2, 4, 7, 14, 28 respectively. There are 3 commonly used methods to find the GCF of 21 and 28 – long division, prime factorization, and Euclidean algorithm.

### What are the common factors of 28 and 60?

The factors of 28 and 60 are 1, 2, 4, 7, 14, 28 and 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 respectively. There are 3 commonly used methods to find the GCF of 28 and 60 – Euclidean algorithm, long division, and prime factorization.

### What are the factor pairs for 60?

Hence, the factors of 60 in pairs are (1, 60), (2, 30), (3, 20), (4, 20), (5, 12), and (6, 10).

**What is the factor tree of 60?**

Answer: The two different factor trees of 60 show the same prime factors of 60 which are 2, 2, 3, and 5. We can express 60 as the product of two numbers but its prime factorization will always remain the same. Explanation: Prime factorization of a composite number is always unique.

#### What are the factors of 28?

The factors of 28 are the numbers that can evenly divide 28. These factors are 1,2,4,7,14 and 28.

#### What are the factors of 21?

The factors of 21 are 1, 3, 7 and 21. Factor pairs of the number 21 are the numbers that result in the original number multiplying them together. To find the factors of a number, 21, we can use the factorization method.

**What is the least common factor of 21 and 28?**

84

The LCM of 21 and 28 is 84.

## Which is the factor of 28?

## What is the LCM of 28 and 60?

In common notation: lcm (28,60) = 420.

**What is the GCF of 28 and 60 and 20?**

So the Greatest Common Factor 28, 60, 20 is 4.

### What are the multiples of 60?

The list of multiples of 60 is given as: 60, 120, 180, 240, 300, 360, 420, 480, 540, 600, 660, 720, 780, 840, 900, 960, 1020, 1080, 1140, 1200, 1260, 1320, 1380, 1440, 1500, 1560, 1620, 1680, 1740, 1800, 1860, 1920, 1980, 2040, 2100,…

### What is the factor tree of 28?

1 is the smallest factor of every number. 28 is an even number….Positive pair factors of 28:

Factors | Pair factors |
---|---|

4 × 7 = 28 | (4, 7) |

7 × 4 = 28 | (7, 4) |

14 × 2 = 28 | (14, 2) |

28 × 1 = 28 | (28, 1) |

**What are the factor of 21?**

#### What is a factor tree of 28?

There are 6 factors of 28 of which 28 itself is the biggest factor and its positive factors are 1, 2, 4, 7, 14 and 28. The sum of all factors of 28 is 56….Negative pair factors of 28:

Factors | Pair factors |
---|---|

– 2 × -14 = 28 | (- 2, – 14) |

– 4 × -7 = 28 | (- 4, – 7) |

-7 ×- 4 = 28 | (- 7, – 4) |

-14 × -2 = 28 | (- 14, – 2) |

#### What are factors of 28?

**What is the LCM of 21 and 28?**

## What’s the common denominator of 21 and 28?

Answer: LCM of 21 and 28 is 84.

## What is the greatest common factor of 21 and 28?

Greatest common factor (GCF) of 21 and 28 is 7.