1 x 61 is the only factor pair of 61.
(54,1)(27,2)(18,3)(9,6)
Factor pairs are any two numbers being multiplied to give you a certain number. Examples for 20: 1x20, 20x1, 2x10, 10x2, 4x5, and 5x4 are all factor pairs for 20.
The factor pairs of 51 are (1,51) and (17,3)
The difference is between factor pairs and distinct factors. With square numbers, one of the factor pairs will be the same number twice. When listing the distinct factors, that number is only listed once.
1x40, 2x20, 4x10, 5x8 are all the factor pairs of 40.
The factor pairs of 20 are: 20,1 / 10,2 / 5,4
The factor pairs for 38 are (1, 19) and (2, 38).
The factor pairs of 26 are: 1 × 26 2 × 13
164 82,2 41,2,2
The greatest common factor of 164 and 375 is 1.
53,1
1,3,149,447
1,81,3,27,9
They are:165,155,333,515,11
51,117,3
108,154,236,327,418,612,9