22 x 7 = 28
256 = 28.
22 x 7 = 28
22 x 71
768 = 28 x 31
28 = 22 x 71
28 x 56 = 4,000,000
28 = 22 x 71
22 x 7 = 28
prime factors of 28 are: 2, 2, 7.prime factors of 75 are: 3, 5, 5.As 28 and 75 have no common prime factors, their greatest common factor is 1.
22 x 7 = 28
28 is a composite number because it has factors other than 1 and itself. It is not a prime number.The 6 factors of 28 are 1, 2, 4, 7, 14, and 28.1 + 2 + 4 + 7 + 14,The factor pairs of 28 are 1 x 28, 2 x 14, and 4 x 7.The proper factors of 28 are 1, 2, 4, 7, and 14 or,if the definition you are using excludes 1, they are 2, 4, 7, and 14.The prime factors of 28 is 2 and 7.Note: There is repetition of these factors, so if the prime factors are being listed instead of the prime factorization, usually only the distinct prime factors are listed.Prime numbers mean only 1 and it self are its factors.The distinct prime factors (listing each prime factor only once) of 28 are 2 and 7.The prime factorization of 28 is 2 x 2 x 7 or, in index form (in other words, using exponents), 22 x 7.NOTE: 28 is also a perfect number because the sum of its proper factors (the definition including 1) equals itself: 1 + 2 + 4 + 7 + 14 = 28.NOTE: There cannot be common factors, a greatest common factor, or a least common multiple because "common" refers to factors or multiples that two or more numbers have in common.