Answer:
I think $10 is the answer
In arithmetic and number theory, the least common multiple, lowest common multiple, or smallest common multiple of two integers a and b, usually denoted by LCM(a, b), is the smallest positive integer that is divisible by both a and b. SOOO, no there can be a lower number then both multiplied by each other.
Our function is:
Now, if 
is a factor of 
then 
must satisfy the equation:
So, 
Putting
We get,
So, the value of 'a' for the given expression is 1281.
