To find all the divisors of the number 395,076:
- 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 395,076:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
395,076 = 22 × 3 × 11 × 41 × 73
395,076 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) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 395,076
- 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
prime factor =
11
composite factor = 2
2 × 3 =
12
composite factor = 2 × 11 =
22
composite factor = 3 × 11 =
33
prime factor =
41
composite factor = 2
2 × 11 =
44
composite factor = 2 × 3 × 11 =
66
prime factor =
73
composite factor = 2 × 41 =
82
composite factor = 3 × 41 =
123
composite factor = 2
2 × 3 × 11 =
132
composite factor = 2 × 73 =
146
composite factor = 2
2 × 41 =
164
composite factor = 3 × 73 =
219
composite factor = 2 × 3 × 41 =
246
composite factor = 2
2 × 73 =
292
composite factor = 2 × 3 × 73 =
438
composite factor = 11 × 41 =
451
composite factor = 2
2 × 3 × 41 =
492
This list continues below...
... This list continues from above
composite factor = 11 × 73 =
803
composite factor = 2
2 × 3 × 73 =
876
composite factor = 2 × 11 × 41 =
902
composite factor = 3 × 11 × 41 =
1,353
composite factor = 2 × 11 × 73 =
1,606
composite factor = 2
2 × 11 × 41 =
1,804
composite factor = 3 × 11 × 73 =
2,409
composite factor = 2 × 3 × 11 × 41 =
2,706
composite factor = 41 × 73 =
2,993
composite factor = 2
2 × 11 × 73 =
3,212
composite factor = 2 × 3 × 11 × 73 =
4,818
composite factor = 2
2 × 3 × 11 × 41 =
5,412
composite factor = 2 × 41 × 73 =
5,986
composite factor = 3 × 41 × 73 =
8,979
composite factor = 2
2 × 3 × 11 × 73 =
9,636
composite factor = 2
2 × 41 × 73 =
11,972
composite factor = 2 × 3 × 41 × 73 =
17,958
composite factor = 11 × 41 × 73 =
32,923
composite factor = 2
2 × 3 × 41 × 73 =
35,916
composite factor = 2 × 11 × 41 × 73 =
65,846
composite factor = 3 × 11 × 41 × 73 =
98,769
composite factor = 2
2 × 11 × 41 × 73 =
131,692
composite factor = 2 × 3 × 11 × 41 × 73 =
197,538
composite factor = 2
2 × 3 × 11 × 41 × 73 =
395,076
48 factors (divisors)
What times what is 395,076?
What number multiplied by what number equals 395,076?
All the combinations of any two natural numbers whose product equals 395,076.
1 × 395,076 = 395,076
2 × 197,538 = 395,076
3 × 131,692 = 395,076
4 × 98,769 = 395,076
6 × 65,846 = 395,076
11 × 35,916 = 395,076
12 × 32,923 = 395,076
22 × 17,958 = 395,076
33 × 11,972 = 395,076
41 × 9,636 = 395,076
44 × 8,979 = 395,076
66 × 5,986 = 395,076
73 × 5,412 = 395,076
82 × 4,818 = 395,076
123 × 3,212 = 395,076
132 × 2,993 = 395,076
146 × 2,706 = 395,076
164 × 2,409 = 395,076
219 × 1,804 = 395,076
246 × 1,606 = 395,076
292 × 1,353 = 395,076
438 × 902 = 395,076
451 × 876 = 395,076
492 × 803 = 395,076
24 unique multiplications The final answer:
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