How can I submit multiple R job at once?

I have a R-script which runs multiple files say file=1 to 50. I usually submit repeated jobs say 5 times with 10 files each time by changing the number in R-script. So, how can I submit the 5-job at once without submitting the job 5 times? In addition, I want to update the **default.out** and **errorfile** for each job. sample bash code:

#!/bin/bash

#PBS -l nodes=1:ppn=20,walltime=05:00:00

#PBS -m e
#PBS -o default.out
#PBS -e errorfile

module load R/4.0

Rscript ~/r_script1.R