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 tree of 201 is: 3 x 67 The factors of 201 are: 1, 3, 67, 201.
The factor pairs for 38 are (1, 19) and (2, 38).
The factor pairs of 26 are: 1 × 26 2 × 13
201 3,67
Its factors are: 1, 3, 67 and 201
53,1
1,3,149,447
164,182,241,4
1,81,3,27,9
They are:165,155,333,515,11