The LCF (Lowest Common Factor - the lowest number that divides both) is 1.
I guess you mean either:
The HCF is also called the GCF - Greatest Common Factor.
The GCF is 18. The LCF is 1.
3
36
36
The least common factor of any two integers MUST be 1.
36/60 = 12/20 = 6/10 = 3/5
You need to have at least two numbers to find an LCF, but I'll save you the trouble. The LCF of any two numbers is one. It's usually more productive to find the GCF or the LCM.
there are 36 inches in a yard so there are 126/36 yards in 126 inches. 126/36 = 63/18 = 7/2 = 3.5
The Greatest Common Factor of 54, 126, 36: 18
126 divided by 36 = 3.5
The LCF is 1. The GCF is 7. The LCM is 126. The GCM is infinite.
The GCF is 18.