1, 2, 4 and 8
The least common factor of any set of integers is 1.
The numbers 1, 2 and 4.
The common factors are: 1, 2, 3, 4, 6, 12. 12 is the greatest common factor of 72 and 84. All the factors of 12 will therefore divide by both 72 and 84.
Try it out! Divide 72 by 48, for example on a calculator. If you get a whole number, it is; otherwise it's not.
The common factors of both number are: 1, 3 and 9
72
Since 36 is a factor of 72, the factors of 36 are included in the factors of 72.
Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36. The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. All of the factors of 36 are also factors of 72.
Apart from 1, all of the other factors of 72 are multiples of prime factors.
Since 36 is a factor of 72, all of its factors are included in the factors of 72.
The highest common factor (HCF) of 48 and 72 is 24. To find the HCF, you can list the factors of each number and identify the largest number that both 48 and 72 share. The factors of 48 are 1, 2, 3, 4, 6, 8, 12, 16, 24, and 48, while the factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. The largest number that appears in both lists is 24, making it the HCF.
The prime factors for 72 are: 2, 3