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IKMC 2020 - Grades 11-12 - Set 2 - Self-study Question 29

IKMC · IKMC 2020 - Grades 11-12 - Set 2 - Self-study

Question 29

Distinct primes $p_1,\ldots,p_n$ are written from left to right in the bottom row. Every box directly above two adjacent boxes contains their product. The top number is $K=p_1^{\alpha_1}\cdots p_n^{\alpha_n}$. If $\alpha_2=8$, how many numbers in the entire table are divisible by $p_4$?

Question illustration
  1. 4
  2. 16
  3. 24
  4. 28
  5. 36