5 x 19
a composite number seems a reasonable answer.
35 (the two prime factors of 875 are 5 and 7).
A composite number is the product of two or more prime numbers.
No - because its factors include each of the two prime numbers.
42 as a product of its prime factors is 2*3*7. 90 as a product of its prime factors is 2*3*3*5.
The two prime numbers that are factors of 375 are 3 and 5!
4
Numbers that have 2 factors are prime numbers; Numbers that have 4 factors are either: * the cube of a prime; or * the product of two different primes; Numbers that have 8 factors are either: * a prime to the power 7; * the product of a prime cubed and different prime; * the product of three different primes.
As a product of its prime factors: 3*17 = 51
No because it has more than two factors and as a product of its prime factors: 23*127 = 2921
Every product of two prime numbers has four factors.
As a product of its prime factors: 5*17 = 85