Q: What is the smallest number with 2 5 and 7 as prime factors?

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70 is the smallest number that has prime factors of 2,5 and 7

The smallest number with three different prime factors is 30.

Starting from beginning we see that 0 has infinite factors so it is a composite number and 1 is neither prime nor composite. The next number is 2 which has only two factors so it is the smallest Prime number.

It is: 30

It is 11 which is a prime number whose factors are itself and one

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70 is the smallest number that has prime factors of 2,5 and 7

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).

The smallest number with three different prime factors is 30.

There isn't one. Negative numbers have prime factors and numbers don't stop. The smallest positive numbers with a prime factor is 2.

Starting from beginning we see that 0 has infinite factors so it is a composite number and 1 is neither prime nor composite. The next number is 2 which has only two factors so it is the smallest Prime number.

It is: 30

70

70

It is 11 which is a prime number whose factors are itself and one

2 x 3 x 5 = 30

5 and 11

84