><span class="op">)</span>,B<span class="op">=</span><span class="fu"><a href="https://rdrr.io/r/base/factor.html" class="external-link">factor</a></span><span class="op">(</span><span class="fl">1</span><span class="op">:</span><span class="fl">2</span><span class="op">)</span>,C<span class="op">=</span><span class="fu"><a href="https://rdrr.io/r/base/factor.html" class="external-link">factor</a></span><span class="op">(</span><span class="fl">1</span><span class="op">:</span><span class="fl">2</span><span