To find all the divisors of the number 20,003,324:
- 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 20,003,324:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
20,003,324 = 22 × 11 × 383 × 1,187
20,003,324 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) = 3 × 2 × 2 × 2 = 24
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 20,003,324
- 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
composite factor = 2
2 =
4
prime factor =
11
composite factor = 2 × 11 =
22
composite factor = 2
2 × 11 =
44
prime factor =
383
composite factor = 2 × 383 =
766
prime factor =
1,187
composite factor = 2
2 × 383 =
1,532
composite factor = 2 × 1,187 =
2,374
composite factor = 11 × 383 =
4,213
This list continues below...
... This list continues from above
composite factor = 2
2 × 1,187 =
4,748
composite factor = 2 × 11 × 383 =
8,426
composite factor = 11 × 1,187 =
13,057
composite factor = 2
2 × 11 × 383 =
16,852
composite factor = 2 × 11 × 1,187 =
26,114
composite factor = 2
2 × 11 × 1,187 =
52,228
composite factor = 383 × 1,187 =
454,621
composite factor = 2 × 383 × 1,187 =
909,242
composite factor = 2
2 × 383 × 1,187 =
1,818,484
composite factor = 11 × 383 × 1,187 =
5,000,831
composite factor = 2 × 11 × 383 × 1,187 =
10,001,662
composite factor = 2
2 × 11 × 383 × 1,187 =
20,003,324
24 factors (divisors)
What times what is 20,003,324?
What number multiplied by what number equals 20,003,324?
All the combinations of any two natural numbers whose product equals 20,003,324.
1 × 20,003,324 = 20,003,324
2 × 10,001,662 = 20,003,324
4 × 5,000,831 = 20,003,324
11 × 1,818,484 = 20,003,324
22 × 909,242 = 20,003,324
44 × 454,621 = 20,003,324
383 × 52,228 = 20,003,324
766 × 26,114 = 20,003,324
1,187 × 16,852 = 20,003,324
1,532 × 13,057 = 20,003,324
2,374 × 8,426 = 20,003,324
4,213 × 4,748 = 20,003,324
12 unique multiplications The final answer:
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