Web Reference: We can take the biggest prime factors from 11-20 and multiply them. 20 = 2^2 * 5. 19 = 19. 18 = 2 * 3^2. 17 = 17. 16 = 2^4. 15 = 3 * 5. 14 = 2 * 7. 13 = 13. 11 = 11. Answer = 11 * 13 * 7 * 5 * 2^4 * 17 * 3^2 * 19. Or we can continuously take the lcm, for example a = lcm (20,19), b = lcm (a,18), etc. The problems archives table shows problems 1 to 981. If you would like to tackle the 10 most recently published problems, go to Recent problems. Apr 15, 2023 · For this I will implement three steps: We need a function which dissembles a number into its prime factors and their multiplicities. For 20 this would be 2² × 5¹. In Python I can express this as a {2: 2, 5: 1}. The function uses the prime generator from Solution 3: Largest prime factor.
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