124
For 105, 15 and 7
For -19, 1 and -19
The factor pairs of 105 are: 1 x 105 3 x 35 5 x 21 7 x 15
1 and 105, and 3 and 105 are two possible pairs.
121 - 16 = 105. There are two other pairs.
15 and 21 21 and 35
Prime numbers have one factor pair. Composite numbers have two or more pairs. (6,8) and (4,12) are two different factor pairs for 48.
21 and 35 7 and 15
7 and 15 35 and 3
15 and 7 21 and 5
7 and 15 35 and 3
7 and 15 15 and 21
Factor pairs are any two numbers being multiplied to give you a certain number. Factor Pairs of 16: 8x2, 4x4, and 16x1.
They are called relative prime numbers.