The right answer is 5x5x17
245 = 5 × 72
The prime factorization for 245 is 7^2 x 5
285 = 3*5*19.
175/245 = 5/7
245 = 5*7*7 or 5*72
245 = 5*7*7 or 5*72
To find the prime factorization it helps to first divide by obvious divisors. In this case, the number ends in a 5, so we know it can divide by 5. Do this and you get 49. This is known from times tables to be 7x7. Thus the prime factorization of 245 is 5x7x7.
23x19
13,2,4,7,3,1,8,358,24,27,792,45,89,32 and 97.
152 = 2x2x2x19.2,2,2,19
The answer is 2x5x2 3
2*5*19
1, 2 and 13
3*3*7
17*17 = 289
49 = 7*7