One pair: it's a prime number.
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.
560 is one such.
18 is a single number. The factor pairs of 18 are (18,1)(9,2)(6,3)
-4^1389 + 66=+67^7890
The factor pairs for 38 are (1, 19) and (2, 38).
(38,1)(19,2)
(38,1)(19,2)
1 and 38, 2 and 19
38 = 1*38, 2*19
No, the number 38 is not a factor of 100.
its a factor with two pairs of the same number
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
You're looking for factors of 38 that have a difference of 17. Luckily, 38 only has two factor pairs. It's not 38 and 1. (y - 2)(y + 19)
The number 18.