Mein LaTeX-Forum

\documentclass[10pt]{article}
\usepackage{graphicx}
\usepackage{rotating}
\usepackage{grffile}
\usepackage{forloop}
\usepackage[margin=.9cm]{geometry}
\usepackage{pdflscape}

\begin{document}

\pagestyle{empty}
\begin{landscape}
\newcounter{ct}
\newcommand{\gleichung}{}
\forloop{ct}{1}{\value{ct}<39}
{
\begin{figure}%
%\centering
\includegraphics[width=\textwidth,keepaspectratio]{\arabic{ct}.png}%
\end{figure}
\newpage

}

\end{landscape}

\end{document}