Find the common factors of the pair of numbers. Begin with the smallest. <br> 20 and 50:<input min="0" type="number" id ="imp4pg006q7c_1" class="lineinput" placeholder="?" /> <input min="0" type="number" id ="imp4pg006q7c_2" class="lineinput" placeholder="?" /> <input min="0" type="number" id ="imp4pg006q7c_3" class="lineinput" placeholder="?" /> <input min="0" type="number" id ="imp4pg006q7c_4" class="lineinput" placeholder="?" />