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Q: What are the numbers less than 500 which have four different prime factors?

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the least number is 210 which is divisible by four different prime numbers.

420 has four prime factors: 2,3,5,7

420 has four prime factors. Prime factors don't usually travel in pairs.

39 is not a prime number because it has four factors: 1,3,13,39 and because prime number are numbers who has 2 factors.

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.

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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).

420 has 5 prime factors, four of which are different prime numbers. Prime factors of 420 are 2 x 2 x 5 x 3 x 7.

47 does not have 4 prime numbers (factors or divisors).

They are numbers that are the product of two different prime numbers. If the primes are p and q, the four factors are 1, p, q and pq.

what is the smallest positive integer that has four different prime factors

336

the least number is 210 which is divisible by four different prime numbers.

420 has four prime factors: 2,3,5,7

420 has four prime factors. Prime factors don't usually travel in pairs.

210 is the number whose prime factors are the first four primes unrepeated.

Every product of two prime numbers has four factors.

Four of them.

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