askvity

Do prime numbers have no divisors?

Published in Prime Numbers 1 min read

No, that's not quite accurate. Prime numbers do have divisors. The defining characteristic of a prime number is that it has exactly two distinct positive divisors: 1 and itself.

Here's a breakdown:

  • Definition of a Prime Number: A prime number is a natural number greater than 1 that has only two positive integer divisors: 1 and the number itself.

  • Examples:

    • The number 7 is prime because its only divisors are 1 and 7.
    • The number 11 is prime because its only divisors are 1 and 11.
    • The number 4 is not prime because it has divisors 1, 2, and 4.
  • Important Clarification: It's more accurate to say that prime numbers have no divisors other than 1 and themselves. The statement "prime numbers have no divisors" is technically incorrect.

  • Composite Numbers: Numbers greater than 1 that have more than two divisors are called composite numbers.

Number Divisors Prime?
2 1, 2 Yes
3 1, 3 Yes
4 1, 2, 4 No
5 1, 5 Yes
6 1, 2, 3, 6 No

In summary, prime numbers are characterized by having exactly two divisors: 1 and themselves. They don't have no divisors; they simply don't have any other divisors beyond these two.

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