177 = 180 - 3 and 3 goes into 180 so not a prime (59 x 3 = 177)
no
If it is composite, you can not make a number prime.
It is divisible by 3 or 59 177/59=3
As a product of its prime factors: 3*59 = 177
Since the sum if its digits (1 + 7 + 7 = 15) is divisible by 3, the original number 177 is divisible by 3.Now we know that it has at least one factor in addition to '1' and itself, so it's not prime.
Because it has more than two factors
177, using the '3' divisibility rule, 7 + 7 + 1 = 15, where 15 mod 3 = 0. Thus, 177 is divisible by 3. 177/3 = 59. 59 is a prime, thus the factors of 177 is:{1, 3, 59, 177}, the only ones that properly divide 177.
531 is not a prime number. Other than itself and one, it is also divisible by 3, 9, 59, and 177.
factors: 1, 3, 59, 177prime factors: 3, 59
3 and 17, as well as 7 and 13.1 + 193 + 177 + 13
531 is a composite number because it has factors other than 1 and itself. It is not a prime number.The 6 factors of 531 are 1, 3, 9, 59, 177, and 531.The factor pairs of 531 are 1 x 531, 3 x 177, and 9 x 59.The proper factors of 531 are 1, 3, 9, 59, and 177 or,if the definition you are using excludes 1, they are 3, 9, 59, and 177.The prime factors of 531 are 3, 3, and 59. 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.The 2 distinct prime factors (listing each prime factor only once) of 531 are 3 and 59.The prime factorization of 531 is 3 x 3 x 59 or, in index form (in other words, using exponents), 32 x 59.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.1, 3, 9, 59, 177, 531