1 and 28, 2 and 14, 4 and 7.
(1, 68) (2, 34) (4, 17)
164,182,241,4
No, you should continue checking for factor pairs even if you find a pair that repeats. A repeating pair indicates that the number is not a prime number, but there may be other factor pairs that have not been identified yet. It is important to exhaust all possible factor pairs to ensure that all factors of the number are identified accurately.
101
1 x 61 is the only factor pair of 61.
1 and A
1,24/2,12/3,8/4,6
The factor pairs of 18 are (1 x 18), (2 x 9), (3 x 6)
A way to show factor pairs in a list of all the factors of a number. A factor rainbow can be used to check whether a list of factors is correct.
All numbers have factors. It is possible to list them as pairs. The factors of 12 are 1, 2, 3, 4, 6 and 12. The factor pairs of 12 are (12,1)(6,2)(4,3)
1 and 20 2 and 10 4 and 5
4 and 5, 1 and 20, 2 and 10
(1, 68) (2, 34) (4, 17)
(1, 63) (3, 21) (7, 9)
(1, 81) (3, 27) (9, 9)
1 and 64, 2 and 32, 4 and 16, 8 and 8
That's an infinite list unless you restrict it to factor pairs. The factor pairs of 120 are (120,1)(60,2)(40,3)(30,4)(24,5)(20,6)(15,8)(12,10)