There are six, but it is traditional to list them least to greatest,
All of the factors are prime.
The prime factors of 51 are 3 and 17. Once you add itself and one, you have all the factors. (1,3,17,51)
Prime factors are factors that are also prime numbers.
The distinct prime factors of 550 are 2, 5 and 11. They add up to 18.
14
12
210 has 4, which is the maximum possible. There are other numbers with 4 different prime factors.
I suppose there are six ways to list them, but generally we stick to least to greatest.
The factors of 38 are 1, 2, 19, and 38. There are four different factors. The prime factors of 38 are 2 and 19. There are two different prime factors.
420 has four prime factors: 2,3,5,7
The only possible prime factors are 2 and 5. But the denominator can, of course, be 1.
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.
Find the different prime factors of 550. They are 2, 5 and 11. Add them. The answer is 18.
There are an infinite number of them. 8 has three prime factors, 30 is the first with three distinct prime factors.
All of the factors are prime.
All numbers have factors. Some factors are prime numbers, some are composite numbers, one is neither. When finding the factors of a number, you find all the factors. The prime factorization is a multiplication string of just prime factors that will total the given number.
Logically, the smallest number with 4 different prime factors would have to be the product of the smallest four prime numbers. So the smallest natural number with four different prime factors is 210 (2*3*5*7).