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 220 is 20
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The greatest common factor (GCF) of 78 and 780 is 78. Since 78 is a factor of 780, it is automatically the GCF.
36400 56*650 = 36400 65*560 = 36400
Least common multiple of 5 and 12 and 13 is 780.
The least common multiple of 39 , 60 = 780
The LCM is: 780