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98 is an even number, thus it is divisible by 2; 98/2 = 49. 49 is simply 72. Since both 2 and 7 are prime numbers, the prime factorization of 98 is 2 X 72.
49 is a prime number itself.
There are 15 prime numbers between 1 and 49
49 = 7 x 7
49 = 7 x 7 and 7 is prime