% arara: pdflatex
documentclass[10pt,twocolumn]{article}
usepackage[margin=0.5in]{geometry}
usepackage[T1]{fontenc}
usepackage[utf8]{inputenc}
usepackage{amstext}
usepackage{amssymb}
usepackage{multirow}
usepackage{amsmath,amssymb}
usepackage{verbatim}
usepackage{authblk}
usepackage{setspace}
renewcommand{familydefault}{sfdefault}
usepackage{helvet}

begin{document}
large
title{Title}
scriptsize
vspace{8 pt}
setstretch{0.1}
author[1]{Author 1}
author[2]{Author 2}
author[3]{Author 3}
author[4]{Author 4}
author[5]{Author 5}
author[1]{Author 6}
author[1]{Author 7}
author[1]{Author 8}
author[1]{Author 9}
author[1]{Author 10}
author[1]{Author 11}
author[1]{Author 12}
author[1]{Author 13}
author[1]{Author 14}
author[1]{Author 15}
author[1]{Author 16}
author[1]{Author 17}
author[1]{Author 18}
author[1]{Author 19}
author[1]{Author 20}
affil[1]{Affiliation 1}
affil[2]{Affiliation 2}
affil[3]{Affiliation 3}
affil[4]{Affiliation 4}
affil[5]{Affiliation 5}
date{}
{letclearpagerelax%
maketitle }
end{document}