Question: (1 point) Suppose an integer x is divisible by 21. What other positive integers must also divide x? [Hint: Think about the transitivity of divides.

(1 point) Suppose an integer x is divisible by 21. What other positive integers must also divide x? [Hint: Think about the transitivity of "divides." Enter your answer as a comma-separated list.] Suppose an integer a is divisible by 16. What other positive integers must also divide a? [Enter your answer as a comma-separated list.]

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