124
The factor pairs of 105 are: 1 x 105 3 x 35 5 x 21 7 x 15
Two pairs of numbers with 105 as their least common multiple are (15, 105) and (21, 105). This means that both pairs of numbers are multiples of 105 and their only common multiple is 105. The least common multiple is the smallest number that both numbers can divide evenly into.
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.
15 and 7 21 and 5
7 and 15 35 and 3
7 and 15 15 and 21
7 and 15 35 and 3
21 and 35 7 and 15
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.