4 log 16Rewrite log(16) log (16) as log(24) log (2 4). Expand log(24) log (2 4) by moving 4 4 outside the logarithm. Rewrite log(4) log (4) as log(22) log (2 2). Expand log(22) log (2 2) by movingHere is the answer to questions like: Calculate 4 log of 16 or what is the base 4 log of 16? Use our | Log4 calculator to find the logarithm of any positive number for any number base you enter.