이경수 선생님의 수학실험실

problem16 (Power digit sum) 215 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.What is the sum of the digits of the number 21000?In Python: # Power digit sum import time startTime = time.time() strNum = str(pow(2,1000)) numList = [int(num) for num in strNum] print(sum(numList)) endTime = time.time() print(endTime - startTime, "seconds") Run time: 0.0006120204925537109 seconds In Jav..