reciprocals, like 2 and 1/2
There are not two prime numbers whose product is 64. The prime factorization of 64 is 2 x 2 x 2 x 2 x 2 x 2, which is 2 to the 6th power. These are the only prime numbers that can be multiplied together to result in 64. There are six of them, not two. The only pair of numbers whose product is 64 that includes one prime number is 2 x 32, but only one number is prime.
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36
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If the product of 2 numbers is one, than those 2 numbers are recipricals
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The set of three numbers whose LCM (Least Common Multiple) is equal to the product of the numbers would be {1, 2, 2}. Here's how it works: LCM(1, 2, 2) = 2, which is also the product of the numbers (1 * 2 * 2 = 4).
Any number and its reciprocal. Examples: 1/2 and 2 1/3 and 3 1/10 and 10 1 million and 0.000001
2 x 23 = 46
2 x 37 = 74 As the product is an even number one of the prime numbers must be 2. Then just check all the even numbers between 70 and 80 that is double a prime number: 74 = 2 x 37.
3 and 7 are prime numbers whose product is 21.
They are: 2*3*5 = 30