To find all the divisors of the number 85,644,075:
- 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 85,644,075:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
85,644,075 = 3 × 52 × 11 × 103,811
85,644,075 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 = (1 + 1) × (2 + 1) × (1 + 1) × (1 + 1) = 2 × 3 × 2 × 2 = 24
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 85,644,075
- 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 =
3
prime factor =
5
prime factor =
11
composite factor = 3 × 5 =
15
composite factor = 5
2 =
25
composite factor = 3 × 11 =
33
composite factor = 5 × 11 =
55
composite factor = 3 × 5
2 =
75
composite factor = 3 × 5 × 11 =
165
composite factor = 5
2 × 11 =
275
composite factor = 3 × 5
2 × 11 =
825
This list continues below...
... This list continues from above
prime factor =
103,811
composite factor = 3 × 103,811 =
311,433
composite factor = 5 × 103,811 =
519,055
composite factor = 11 × 103,811 =
1,141,921
composite factor = 3 × 5 × 103,811 =
1,557,165
composite factor = 5
2 × 103,811 =
2,595,275
composite factor = 3 × 11 × 103,811 =
3,425,763
composite factor = 5 × 11 × 103,811 =
5,709,605
composite factor = 3 × 5
2 × 103,811 =
7,785,825
composite factor = 3 × 5 × 11 × 103,811 =
17,128,815
composite factor = 5
2 × 11 × 103,811 =
28,548,025
composite factor = 3 × 5
2 × 11 × 103,811 =
85,644,075
24 factors (divisors)
What times what is 85,644,075?
What number multiplied by what number equals 85,644,075?
All the combinations of any two natural numbers whose product equals 85,644,075.
1 × 85,644,075 = 85,644,075
3 × 28,548,025 = 85,644,075
5 × 17,128,815 = 85,644,075
11 × 7,785,825 = 85,644,075
15 × 5,709,605 = 85,644,075
25 × 3,425,763 = 85,644,075
33 × 2,595,275 = 85,644,075
55 × 1,557,165 = 85,644,075
75 × 1,141,921 = 85,644,075
165 × 519,055 = 85,644,075
275 × 311,433 = 85,644,075
825 × 103,811 = 85,644,075
12 unique multiplications The final answer:
(scroll down)