its 1 the factors of 38 are 19 and 2 and 45 are 9 and 5 (prime factors would be 5 and 3 and 3)
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Since 45 is a factor of 270, it is automatically the GCF.
The greatest common factor of 15, 45 and 100 is 5.
The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.The greatest common factor of 180 and 231 is 3
The greatest common factor of 45 and 320 is 5.
The greatest common factor of 54, 5, 36, and 45 is 1.