81=9^2
9+9=18
77=7*11
7+11=18
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The prime factors of 18 are 2, 3, and 3. The product of these prime factors is 18.
The distinct prime factors of 18 are 2 and 3. The product of these distinct prime factors is 6.
The factor pairs of 18 are (18,1)(9,2)(6,3) No pair consists of prime numbers. The best we can do is 2 x 3 x 3.
You need at least two numbers to find an LCM. It doesn't matter whether they are prime or composite.
They are 2 and 140 because their LCM is 140 and their product is 280
They could be: 17 and 149
10 and 35
Yes, the least common multiple (LCM) of a prime number and a composite number will always be a multiple of the prime number. This is because the LCM is the smallest number that is a multiple of both numbers. Since the prime number is a factor of itself and the LCM is a multiple of both numbers, the LCM will always be a multiple of the prime number.