How about: 13 times 13 = 169
1 x 507, 3 x 169, 13 x 39.
The two numbers you can multiply together to equal 782 are 23 by 34.
The two numbers you multiply together to equal 391 are 17 by 23.
The two numbers can be any two numbers so that when they are added, they equal 338.
1 x 169 13 x 13
13 x 13
169
169
The 2 numbers that multiply together to equal 678 are 6 and 113.
20
-30