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Q: What are five numbers that have three five and seven as prime factors?

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There are no prime numbers with three factors. By definition, a prime number has exactly two factors - 1 and itself.

Squares of prime numbers have only three factors.

Prime numbers have two factors. 2, 3 and 5 are prime numbers.

That's an infinite list. Numbers with three factors are the squares of prime numbers.

Start with the factors. Multiply combinations of three prime factors, then combinations of five, then seven, etc. All generated numbers will be guaranteed to have an odd number of prime factors.

squares of prime numbers

Three. The prime numbers (factors) of 120 are: 2,3,5

Three. The prime numbers (factors) of 60 are: 2,3,5

Squares of prime numbers have exactly three factors.

56 does not have only three prime factors.

There are an infinite number of them. 8 has three prime factors, 30 is the first with three distinct prime factors.

Numbers with exactly three factors are squares of prime numbers.

Two and three.

squares of prime numbers

They don't. 21 has two prime factors. 42 has three prime factors.

The numbers with only three factors are squares of prime numbers.

55 does not have 3 prime factors.

Squares of prime numbers have three factors.

The prime factors of 110 are 2, 5 and 11. None of them have three digits.

Prime numbers have two factors. Prime squares have three factors. Square numbers have an odd number of factors but that number varies.

By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.

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.

By factoring them. Prime numbers have only two factors. Composite numbers have three or more.

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