162:2=81 81:3=27 27:3=9 9:3=3 3:3=1 ---------- 512:2=256 256:2=128 128:2=64 64:2=32 32:2=16 16:2=8 8:2=4 4:2=2 2:2=1 ----------- 1024: 2=512 512:2=256 256:2=128 128:2=64 64:2=32 32:2=16 16:2=8 8:2=4 4:2=2 2:2=1 ---------- 21780:2=10890 10890:2=5445 5445:3=1815 1815:3=605 605:5=121 121:11=11 11:11=1