(1, 21)
(3, 7)
(21,1)(7,3) (42,1)(21,2)(14,3)(7,6) Since 21 is a factor of 42, all the factors of 21 will be included in the factor pairs of 42.
The factor pairs of 210 are: 1 and 210, 2 and 105, 3 and 70, 5 and 42, 6 and 35, 7 and 30, 10 and 21, and 14 and 15. The factor pairs of 63 are: 1 and 63, 3 and 21, and 7 and 9.
The factor pairs of 21 are (21, 1) (7, 3) Even considering their negative counterparts, they don't add up to -13.
14 and 21, and 21 and 28 are the number pairs between 15 and 30 that have 7 as their greatest common factor.
The factor pairs of 26 are the pairs of numbers that, when multiplied together, equal 26. The factor pairs of 26 are (1, 26) and (2, 13). These pairs represent the integer factors of 26.
The factor pairs of 21 are:1, 213, 7Therefore, the number 21 has two pairs of positive integer factors.
There are two factor pairs of 21: 21 = 1 x 21 21 = 3 x 7
Factors of 21 are 1, 3, 7, and 21; the factor pairs are (1 x 21) and (3 x 7).
1 & 21, and 3 & 7
1 and 21, 3 and 7,
1,21 3,7
21,17,3
(21,1)(7,3)
(21,-1)(7,-3)(-21,1)(-7,3)
(21,1)(7,3) (42,1)(21,2)(14,3)(7,6) Since 21 is a factor of 42, all the factors of 21 will be included in the factor pairs of 42.
There are 3 factor pairs of 63: 63 = 1 x 63 63 = 3 x 21 63 = 7 x 9
Factor pairs of 42 are 1 x 42, 2 x 21, 3 x 14, and 6 x 7.