One pair: it's a prime number.
560 is one such.
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.
Its only factors are itself and one because 71 is a prime number
1 and 38 2 and 19
One pair: it's a prime number.
Factor pairs are two numbers multiplied together to get one number. Examples: One factor pair of 24 is 4, 6. One factor pair of 70 is 5, 14. One factor pair of 144 is 12, 12.
36, for one.
560 is one such.
its a factor with two pairs of the same number
Factors come in pairs. If you know one factor, divide it into the number. The answer will be another factor.
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
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.
A square number has an odd number of factors, but a number with an odd number of factor pairs is nothing special.
Itself and one because 61 is a prime number
Number of factor pairs = number of rectangles
One to one.