(1, 100)
(2, 50)
(4, 25)
(5, 20)
(10, 10)
All of the composite numbers less than 100 have factor pairs.
80 has 5 factor pairs.
60, 72, 84, 90 and 96 have 6 factor pairs.
its a factor with two pairs of the same number
80 has 5 factor pairs.
These are the 16 factor pairs for the number 1,080:1080,1540,2360,3270,4216,5180,6135,8120,9108,1090,1272,1560,1854,2045,2440,2736,30
A square number has an odd number of factors, but a number with an odd number of factor pairs is nothing special.
Number of factor pairs = number of rectangles
(1,100) (10,10)
The number 18.
12 and 18 have three factor pairs.
76 has 3 factor pairs: (1,76), (2,38), (4,19).