(1,1)
(2,1)
(3,1)
(4,1)(2,2)
(5,1)
(6,1)(3,2)
(7,1)
(8,1)(4,2)
(9,1)(3,3)
(10,1)(5,2)
(11,1)
(12,1)(6,2)(4,3)
(13,1)
(14,1)(7,2)
(15,1)(5,3)
(16,1)(8,2)(4,4)
(17,1)
(18,1)(9,2)(6,3)
(19,1)
(20,1)(10,2)(5,4)
(21,1)(7,3)
(22,1)(11,2)
(23,1)
(24,1)(12,2)(8,3)(6,4)
(25,1)(5,5)
(26,1)(13,2)
(27,1)(9,3)
(28,1)(14,2)(7,4)
(29,1)
(30,1)(15,2)(10,3)(6,5)
(31,1)
(32,1)(16,2)(8,4)
(33,1)(11,3)
(34,1)(17,2)
(35,1)(7,5)
(36,1)(18,2)(12,3)(9,4)(6,6)
(37,1)
(38,1)(19,2)
(39,1)(13,3)
(40,1)(20,2)(10,4)(8,5)
(41,1)
(42,1)(21,2)(14,3)(7,6)
(43,1)
(44,1)(22,2)(11,4)
(45,1)(15,3)(9,5)
(46,1)(23,2)
(47,1)
(48,1)(24,2)(16,3)(12,4)(8,6)
(49,1)(7,7)
(50,1)(25,2)(10,5)
(51,1)(17,3)
(52,1)(26,2)(13,4)
(53,1)
(54,1)(27,2)(18,3)(9,6)
(55,1)(11,5)
(56,1)(28,2)(14,4)(8,7)
(57,1)(19,3)
(58,1)(29,2)
(59,1)
(60,1)(30,2)(20,3)(15,4)(12,5)(10,6)
(61,1)
(62,1)(31,2)
(63,1)(21,3)(9,7)
(64,1)(32,2)(16,4)(8,8)
(65,1)(13,5)
(66,1)(33,2)(22,3)(11,6)
(67,1)
(68,1)(34,2)(17,4)
(69,1)(23,3)
(70,1)(35,2)(14,5)(10,7)
(71,1)
(72,1)(36,2)(24,3)(18,4)(12,6)(9,8)
(73,1)
(74,1)(37,2)
(75,1)(25,3)(15,5)
(76,1)(38,2)(19,4)
(77,1)(11,7)
(78,1)(39,2)(26,3)(13,6)
(79,1)
(80,1)(40,2)(20,4)(16,5)(10,8)
(81,1)(27,3)(9,9)
(82,1)(41,2)
(83,1)
(84,1)(42,2)(28,3)(21,4)(14,6)(12,7)
(85,1)(17,5)
(86,1)(43,2)
(87,1)(29,3)
(88,1)(44,2)(22,4)(11,8)
(89,1)
(90,1)(45,2)(30,3)(18,5)(15,6)(10,9)
(91,1)(13,7)
(92,1)(46,2)(23,4)
(93,1)(31,3)
(94,1)(47,2)
(95,1)(19,5)
(96,1)(48,2)(32,3)(24,4)(16,6)(12,8)
(97,1)
(98,1)(49,2)(14,7)
(99,1)(33,3)(11,9)
(100,1)(50,2)(25,4)(20,5)(10,10)
Factors are numbers you can multiply together to get another number. The factor pairs are: (1, 52) (2, 26) (4, 13)
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 500, 2 and 250, 4 and 125, 5 and 100, 10 and 50, 20 and 25, a total of 6 factor pairs.
1,90,2,45,3,30,18,5,15,6 9,10
The factor pairs of 50 are: 1 x 50 2 x 25 5 x 10
All of the composite numbers less than 100 have factor pairs.
Factors are numbers you can multiply together to get another number. The factor pairs are: (1, 52) (2, 26) (4, 13)
Only two: (4, 9) and (6, 6). In all other factor pairs, one of the numbers is not composite.
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)
(100,1)(50,2)(25,4)(20,5)(10,10)
1 and 500, 2 and 250, 4 and 125, 5 and 100, 10 and 50, 20 and 25, a total of 6 factor pairs.
Apart from [1,201], [3,67] is the only other factor pair. Since both 3 and 67 are prime numbers, you know you won't be able to find any more factor pairs.
Factor pairs are any two numbers being multiplied to give you a certain number. Examples for 20: 1x20, 20x1, 2x10, 10x2, 4x5, and 5x4 are all factor pairs for 20.
Composite numbers have factors that can be listed in pairs. The factor pairs for 720 are (720,1)(360,2)(240,3)(180,4)(144,5)(120,6)(90,8)(80,9)(72,10)(60,12)(48,15)(45,16)(40,18)(36,20)(30,24)
1x40, 2x20, 4x10, 5x8 are all the factor pairs of 40.
The factor pairs of 20 are: 20,1 / 10,2 / 5,4
The factor pairs for 38 are (1, 19) and (2, 38).