Q: What are the least common factors of 13 and 81?

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The factors of 81 are 1, 3, 9, 27, and 81. The factors of 243 are 1, 3, 9, 27, 81, and 243. The common factors of 81 and 243 are 1, 3, 9, 27, and 81. Therefore, the least common factor (the smallest common factor) is 1.

Least Common Multiple (LCM) for 13 81 is 1,053.

The only common factor is 1

The factors of 64 are all 2s and the factors of 81 are all 3s. The greatest common factor is 1, since they have no factors in common. ■

The least common factor of any numbers is typically 1. The factors of 45 are 1, 3, 5, 9, 15, and 45. The factors of 81 are 1, 3, 9, 27, and 81. The common factors are 1, 3, and 9. The least (smallest) common factor is 1.

There cannot common factors of just one number. To be common there need to be at least two numbers.

For 13: 13 For 81: 3

Assuming that least common refers to the least common multiple, LCM(27, 81) = 81

There is not a greatest common factor of 81 because there cannot be a greatest common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common.The factors of 81 are 1, 3, 9, 27, and 81.The prime factors of 81 are 3, 3, 3, and 3.Examples:The greatest common factor of 54 and 81 is 27.The greatest common factor of 81 and 117 is 9.You need at least two numbers to find a GCF.You need at least two numbers to find a GCF.

81 and 200 have no common prime factors.

The common factors of 15 and 81 are 1 and 3

The factors of 81 are 1, 3, 9, 27 and 81. For them to be common, they need to be compared to another set of factors.