The sum of all factors of 38 is 60. Its Prime Factors are 1, 2, 19, 38 and (1, 38) and (2, 19) are Pair Factors.

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number. The number 39 can be evenly divided by 1 3 13 and 39, with no remainder. Since 39 cannot be divided by just 1 and 39, it is a composite number.

Factors of 39

• Factors of 39: 1, 3, 13, and 39.
• Factors of -39: -1, -3, -13, and -39.
• Prime Factorization of 39: 39 = 13 × 3.

The factors of 39 are 1, 3, 13, 39. Whereas factors of 52 are 1, 2, 4, 13, 26, 52. So, there are 2 two common factors of 39 and 52 which are 1, 13. The greatest common factor among them is 13.

The prime factorization of 39 is 3 and 13.

The prime factorization of 81 is given by 3 x 3 x 3 x 3.

Greatest Common Factor (GCF) of two numbers the factors of 40 are 1, 2, 4, 5, 8, 10, 20 and 40, and the factors of 50 are 1, 2, 5, 10, 25 and 50.

The only way to write 42 as the product of primes (except to change the order of the factors) is 2 × 3 × 7. We call 2 × 3 × 7 the prime factorization of 42.

The number 42 is divisible by 1, 2, 3, 6, 7, 14, 21, 42. For a number to be classified as a prime number, it should have exactly two factors. Since 42 has more than two factors, i.e. 1, 2, 3, 6, 7, 14, 21, 42, it is not a prime number.

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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 42 is about 6.481. Thus, the square root of 42 is not an integer, and therefore 42 is not a square number.

No, 51 is not a prime number. The number 51 is divisible by 1, 3, 17, 51.