because they can not be divided any further
247/13=19 247 is not a prime
factors: 1, 11, 13, 19, 143, 209, 247, 2717prime factors: 11, 13, 19
The factors are: 1, 3, 13, 19, 39, 57, 247, 741 The prime factorisation is 3 x 13 x 19
The prime factors of 494 are 2, 13, and 19. The prime factors of 741 are 3, 13, and 19. The common factors are 13 and 19, so the greatest common factor is 13 x 19 = 247.
13 x 19 = 247
The factors of 247 are 1, 13, 19, and 247
247 is not prime. 247 = 13 * 19
The two prime numbers 13*19=247
1, 7, 13, 19, 91, 133, 247, 1729 The prime factors are 7, 13, 19
1, 13, 19, and 247.
The factors of 95 are: 1, 5, 19, 95 The factors of 247 are: 1, 13, 19, 247
The positive integer factors of 2223 are: 1, 3, 9, 13, 19, 39, 57, 117, 171, 247, 741, 2223 The prime factors of 2223 are: 3, 13, 19 The prime factorization of 2223 is: 32 x 13 x 19