1x40, 2x20, 4x10, 5x8 are all the factor pairs of 40.
The factor pairs of 20 are: 20,1 / 10,2 / 5,4
3 x 149 = 447
The factor pairs for 38 are (1, 19) and (2, 38).
The factor pairs of 26 are: 1 × 26 2 × 13
1 x 2235, 3 x 745, 5 x 447, 15 x 149, 149 x 15, 447 x 5, 745 x 3, 2235 x 1
53,1
612,1306,2204,3153,4102,668,951,1236,1734,18
57,119,3
164,182,241,4
1,81,3,27,9
They are:165,155,333,515,11