To find all the divisors of the number 1,000,000,250:
- 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 1,000,000,250:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
1,000,000,250 = 2 × 53 × 41 × 97,561
1,000,000,250 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) × (3 + 1) × (1 + 1) × (1 + 1) = 2 × 4 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 1,000,000,250
- 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 =
5
composite factor = 2 × 5 =
10
composite factor = 5
2 =
25
prime factor =
41
composite factor = 2 × 5
2 =
50
composite factor = 2 × 41 =
82
composite factor = 5
3 =
125
composite factor = 5 × 41 =
205
composite factor = 2 × 5
3 =
250
composite factor = 2 × 5 × 41 =
410
composite factor = 5
2 × 41 =
1,025
composite factor = 2 × 5
2 × 41 =
2,050
composite factor = 5
3 × 41 =
5,125
composite factor = 2 × 5
3 × 41 =
10,250
This list continues below...
... This list continues from above
prime factor =
97,561
composite factor = 2 × 97,561 =
195,122
composite factor = 5 × 97,561 =
487,805
composite factor = 2 × 5 × 97,561 =
975,610
composite factor = 5
2 × 97,561 =
2,439,025
composite factor = 41 × 97,561 =
4,000,001
composite factor = 2 × 5
2 × 97,561 =
4,878,050
composite factor = 2 × 41 × 97,561 =
8,000,002
composite factor = 5
3 × 97,561 =
12,195,125
composite factor = 5 × 41 × 97,561 =
20,000,005
composite factor = 2 × 5
3 × 97,561 =
24,390,250
composite factor = 2 × 5 × 41 × 97,561 =
40,000,010
composite factor = 5
2 × 41 × 97,561 =
100,000,025
composite factor = 2 × 5
2 × 41 × 97,561 =
200,000,050
composite factor = 5
3 × 41 × 97,561 =
500,000,125
composite factor = 2 × 5
3 × 41 × 97,561 =
1,000,000,250
32 factors (divisors)
What times what is 1,000,000,250?
What number multiplied by what number equals 1,000,000,250?
All the combinations of any two natural numbers whose product equals 1,000,000,250.
1 × 1,000,000,250 = 1,000,000,250
2 × 500,000,125 = 1,000,000,250
5 × 200,000,050 = 1,000,000,250
10 × 100,000,025 = 1,000,000,250
25 × 40,000,010 = 1,000,000,250
41 × 24,390,250 = 1,000,000,250
50 × 20,000,005 = 1,000,000,250
82 × 12,195,125 = 1,000,000,250
125 × 8,000,002 = 1,000,000,250
205 × 4,878,050 = 1,000,000,250
250 × 4,000,001 = 1,000,000,250
410 × 2,439,025 = 1,000,000,250
1,025 × 975,610 = 1,000,000,250
2,050 × 487,805 = 1,000,000,250
5,125 × 195,122 = 1,000,000,250
10,250 × 97,561 = 1,000,000,250
16 unique multiplications The final answer:
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