Two factors.
2. 1x13
The product is: 13 times 5 = 65
It is 7*13 = 91
5 x 13
13 and 7
They only have a common factor of one(1), so the product of 13 & 15 is the same as the LCM. 195
7 x 13 = 91
It is 13 and as a product of its prime factors: 2*5*13 = 130
As a product of its prime factors: 3*3*7*13 = 819
Two
A factor multiplies with another factor to create a product.
It is: 2*2*2*7*11*13 = 8008
2 x 3 x 5 x 13 = 390