To find all the divisors of the number 253,164:
- 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 253,164:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
253,164 = 22 × 3 × 172 × 73
253,164 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 = (2 + 1) × (1 + 1) × (2 + 1) × (1 + 1) = 3 × 2 × 3 × 2 = 36
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 253,164
- 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
2 × 3 =
12
prime factor =
17
composite factor = 2 × 17 =
34
composite factor = 3 × 17 =
51
composite factor = 2
2 × 17 =
68
prime factor =
73
composite factor = 2 × 3 × 17 =
102
composite factor = 2 × 73 =
146
composite factor = 2
2 × 3 × 17 =
204
composite factor = 3 × 73 =
219
composite factor = 17
2 =
289
composite factor = 2
2 × 73 =
292
composite factor = 2 × 3 × 73 =
438
This list continues below...
... This list continues from above
composite factor = 2 × 17
2 =
578
composite factor = 3 × 17
2 =
867
composite factor = 2
2 × 3 × 73 =
876
composite factor = 2
2 × 17
2 =
1,156
composite factor = 17 × 73 =
1,241
composite factor = 2 × 3 × 17
2 =
1,734
composite factor = 2 × 17 × 73 =
2,482
composite factor = 2
2 × 3 × 17
2 =
3,468
composite factor = 3 × 17 × 73 =
3,723
composite factor = 2
2 × 17 × 73 =
4,964
composite factor = 2 × 3 × 17 × 73 =
7,446
composite factor = 2
2 × 3 × 17 × 73 =
14,892
composite factor = 17
2 × 73 =
21,097
composite factor = 2 × 17
2 × 73 =
42,194
composite factor = 3 × 17
2 × 73 =
63,291
composite factor = 2
2 × 17
2 × 73 =
84,388
composite factor = 2 × 3 × 17
2 × 73 =
126,582
composite factor = 2
2 × 3 × 17
2 × 73 =
253,164
36 factors (divisors)
What times what is 253,164?
What number multiplied by what number equals 253,164?
All the combinations of any two natural numbers whose product equals 253,164.
1 × 253,164 = 253,164
2 × 126,582 = 253,164
3 × 84,388 = 253,164
4 × 63,291 = 253,164
6 × 42,194 = 253,164
12 × 21,097 = 253,164
17 × 14,892 = 253,164
34 × 7,446 = 253,164
51 × 4,964 = 253,164
68 × 3,723 = 253,164
73 × 3,468 = 253,164
102 × 2,482 = 253,164
146 × 1,734 = 253,164
204 × 1,241 = 253,164
219 × 1,156 = 253,164
289 × 876 = 253,164
292 × 867 = 253,164
438 × 578 = 253,164
18 unique multiplications The final answer:
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