3 x 17
No two prime numbers satisfy that request.
The prime factors of 51 are 3 and 17.
As a product of its prime factors: 3*17 = 51
3 and 17
The two prime numbers that add up to 98 are 47 and 51. However, since 51 is not a prime number, we can say that there are no two prime numbers that add up to 98. The only even prime number is 2, and when 2 is subtracted from 98, the result is 96, which is not prime. Thus, no such pair of prime numbers exists.
3 and 17
17 and 3 are two prime numbers whose sum is 20. Their product is 51.
The two numbers are prime so their LCM is their product, which is 51.
31 is prime, but 51 is not as 51=3*17.
The digits in 51 add up to 6, so it is divisible by 3.51/3 = 17 (17, like 3 is a prime number)so the prime factors of 51 are the two numbers, 3 and 17(51, like all numbers, can also be divided without remainder by 1, but this is not usually counted as a prime factor)
There are ten prime numbers between 51-100.
51 + 29 = 80