Common divisors

Find all common divisors of numbers 30 and 45.

Result

d = (Correct answer is: 1, 3, 5, 15)

Solution:

$30 = 2 \cdot \ 3 \cdot \ 5 \ \\ 45 = 3^2 \cdot \ 5 \ \\ \ \\ 30: 1, 2, 3, 5, 6, 10, 15, 30 \ \\ 45: 1, 3, 5, 9, 15, 45 \ \\ \ \\ d = 1, 3, 5, 15$

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