To find all the divisors of the number 51,696:
- 1. Decompose the number into prime factors.
- See how you can find out how many factors (divisors) the number has, without actually calculating them.
- 2. Multiply the prime factors in all their unique combinations, that yield different results.
1. Carry out the prime factorization of the number 51,696:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
51,696 = 24 × 32 × 359
51,696 is not a prime number but a composite one.
- Prime number: a natural number that is divisible (divided evenly) only by 1 and itself. A prime number has exactly two factors: 1 and the number itself.
- Examples of prime numbers: 2 (factors 1, 2), 3 (factors 1, 3), 5 (factors 1, 5), 7 (factors 1, 7), 11 (factors 1, 11), 13 (factors 1, 13), ...
- Composite number: a natural number that has at least one factor other than 1 and itself. So it is neither a prime number nor 1.
- Examples of composite numbers: 4 (it has 3 factors: 1, 2, 4), 6 (it has 4 factors: 1, 2, 3, 6), 8 (it has 4 factors: 1, 2, 4, 8), 9 (it has 3 factors: 1, 3, 9), 10 (it has 4 factors: 1, 2, 5, 10), 12 (it has 6 factors: 1, 2, 3, 4, 6, 12), ...
How to count the number of factors of a number?
Without actually finding the factors
- If a number N is prime factorized as:
N = am × bk × cz
where a, b, c are the prime factors and m, k, z are their exponents, natural numbers, .... - ...
- Then the number of factors of the number N can be calculated as:
n = (m + 1) × (k + 1) × (z + 1) - ...
- In our case, the number of factors is calculated as:
- n = (4 + 1) × (2 + 1) × (1 + 1) = 5 × 3 × 2 = 30
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 51,696
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- Also consider the exponents of these prime factors.
- Also add 1 to the list of factors (divisors). All the numbers are divisible by 1.
All the factors (divisors) are listed below - in ascending order
The list of factors (divisors):
Numbers other than 1 that are not prime factors are composite factors (divisors).
neither prime nor composite =
1
prime factor =
2
prime factor =
3
composite factor = 2
2 =
4
composite factor = 2 × 3 =
6
composite factor = 2
3 =
8
composite factor = 3
2 =
9
composite factor = 2
2 × 3 =
12
composite factor = 2
4 =
16
composite factor = 2 × 3
2 =
18
composite factor = 2
3 × 3 =
24
composite factor = 2
2 × 3
2 =
36
composite factor = 2
4 × 3 =
48
composite factor = 2
3 × 3
2 =
72
composite factor = 2
4 × 3
2 =
144
This list continues below...
... This list continues from above
prime factor =
359
composite factor = 2 × 359 =
718
composite factor = 3 × 359 =
1,077
composite factor = 2
2 × 359 =
1,436
composite factor = 2 × 3 × 359 =
2,154
composite factor = 2
3 × 359 =
2,872
composite factor = 3
2 × 359 =
3,231
composite factor = 2
2 × 3 × 359 =
4,308
composite factor = 2
4 × 359 =
5,744
composite factor = 2 × 3
2 × 359 =
6,462
composite factor = 2
3 × 3 × 359 =
8,616
composite factor = 2
2 × 3
2 × 359 =
12,924
composite factor = 2
4 × 3 × 359 =
17,232
composite factor = 2
3 × 3
2 × 359 =
25,848
composite factor = 2
4 × 3
2 × 359 =
51,696
30 factors (divisors)
What times what is 51,696?
What number multiplied by what number equals 51,696?
All the combinations of any two natural numbers whose product equals 51,696.
1 × 51,696 = 51,696
2 × 25,848 = 51,696
3 × 17,232 = 51,696
4 × 12,924 = 51,696
6 × 8,616 = 51,696
8 × 6,462 = 51,696
9 × 5,744 = 51,696
12 × 4,308 = 51,696
16 × 3,231 = 51,696
18 × 2,872 = 51,696
24 × 2,154 = 51,696
36 × 1,436 = 51,696
48 × 1,077 = 51,696
72 × 718 = 51,696
144 × 359 = 51,696
15 unique multiplications The final answer:
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