1, 3, 11, 33
1, 3, 7, 11, 21, 33, 77, 231.
Among the numbers 23, 33, 43, and 63, only 33 and 63 are composite. A composite number has more than two distinct positive divisors, while prime numbers have exactly two. Both 23 and 43 are prime, while 33 (divisible by 1, 3, 11, and 33) and 63 (divisible by 1, 3, 7, 9, 21, and 63) have additional divisors.
The divisors of 66 are 1,2,3,6,11,22,33 and 66.
The divisors of 79 are: 1, 79.
The divisors of 23 are: 1, 23.
The divisors of 99 are: 1, 3, 9, 11, 33, 99.
99 has six divisors: 1, 3, 9, 11, 33, 99.
2,013 has 8 divisors: 1 3 11 33 61 183 671 2013.
The divisors (factors) of 33 are: 1, 3, 11, 33.
1, 3, 7, 11, 21, 33, 77, 231.
Among the numbers 23, 33, 43, and 63, only 33 and 63 are composite. A composite number has more than two distinct positive divisors, while prime numbers have exactly two. Both 23 and 43 are prime, while 33 (divisible by 1, 3, 11, and 33) and 63 (divisible by 1, 3, 7, 9, 21, and 63) have additional divisors.
A perfect number is a number that is the sum of its divisors (the divisors exclude the number itself).When the sum of the divisors is greater than a number then that number is abundant.As the number itself is excluded from the divisors then the only divisor of 31 is 1.So, 31 is a deficient number.Note : The first few abundant numbers are 12,18,20,24,30 ... and these continue to be even. The first abundant odd number is 945 = 33 x 5 x 7 for which its divisors total 975.
31,37 are not composite
Count of divisors: 12 Factorization: 3 * 3 * 7 * 11 Divisors: 1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 231, 693 Sum of divisors: 1248 Number 693 is pronounced six hundred ninety three. Number 693 is a composite number. Factors of 693 are 3 * 3 * 7 * 11. Number 693 has 12 divisors: 1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 231, 693. Sum of the divisors is 1248. Number 693 is not a Fibonacci number. It is not a Bell number. Number 693 is not a Catalan number.
Divisors of 99 are: 1, 3, 9, 11, 33, 99 Prime factors of 99 are: 32 X 11
Divisors are used to divide numbers.
2,4,8 (1 and 16 are divisors too, but the number and 1 are always divisors)