Why do you just want 13136? Why not 13111 as well?
Even though you should always use /usr/xpg4/bin/awk or nawk (instead of awk ) on Solaris/SunOS systems, I can't imagine that awk produced the output you say it did in the script you showed us. In the pipeline you showed us, print $1 should have produced:
I still do not understand your intentions.
The fuser output is in two streams, the pid goes to stdout and the type goes to stderr.
You can capture the stdout in a variable, and suppress stderr