Use a factor tree. 98 49,2 7,7,2
98 49,2 7,7,2
Use a factor tree. 98 49,2 7,7,2
49,2 7,7,2
98 49,2 7,7,2
98 49,2 7,7,2 2 x 7 x 7 = 98
98 49,2 7,7,2 140 70,2 35,2,2 7,5,2,2
196 2 98 98-2 49 49-7 7
Tree 1 for 98 2, 49 2, 7, 7 Tree 2 for 98 14, 7 2, 7, 7
Yes, it is.
The factors of 98: 1, 2, 7, 14, 49, 98
It is a prime factor tree which are: 2*7*7 = 98