begin{longtable}{>{centering}p{108pt}@{hspace{7pt}}>{}p{375pt}}
textcolor{lightgray}{factors} & textcolor{darkgray}{
begin{enumerate}[leftmargin=*,topsep=-1em,parsep=0pt]
item  a
item  b
item  c
item  d
end{enumerate}
}
end{longtable}

begin{longtable}{>{centering}p{108pt}@{hspace{7pt}}>{}p{375pt}}
textcolor{lightgray}{factors} & textcolor{darkgray}{
Some words here
begin{enumerate}[leftmargin=*,topsep=-1em,parsep=0pt]
item  a
item  b
item  c
item  d
end{enumerate}
}
end{longtable}