To find all the divisors of the number 214,107,777:
- 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 214,107,777:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
214,107,777 = 32 × 13 × 1,229 × 1,489
214,107,777 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 214,107,777
- 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
composite factor = 3
2 =
9
prime factor =
13
composite factor = 3 × 13 =
39
composite factor = 3
2 × 13 =
117
prime factor =
1,229
prime factor =
1,489
composite factor = 3 × 1,229 =
3,687
composite factor = 3 × 1,489 =
4,467
composite factor = 3
2 × 1,229 =
11,061
composite factor = 3
2 × 1,489 =
13,401
This list continues below...
... This list continues from above
composite factor = 13 × 1,229 =
15,977
composite factor = 13 × 1,489 =
19,357
composite factor = 3 × 13 × 1,229 =
47,931
composite factor = 3 × 13 × 1,489 =
58,071
composite factor = 3
2 × 13 × 1,229 =
143,793
composite factor = 3
2 × 13 × 1,489 =
174,213
composite factor = 1,229 × 1,489 =
1,829,981
composite factor = 3 × 1,229 × 1,489 =
5,489,943
composite factor = 3
2 × 1,229 × 1,489 =
16,469,829
composite factor = 13 × 1,229 × 1,489 =
23,789,753
composite factor = 3 × 13 × 1,229 × 1,489 =
71,369,259
composite factor = 3
2 × 13 × 1,229 × 1,489 =
214,107,777
24 factors (divisors)
What times what is 214,107,777?
What number multiplied by what number equals 214,107,777?
All the combinations of any two natural numbers whose product equals 214,107,777.
1 × 214,107,777 = 214,107,777
3 × 71,369,259 = 214,107,777
9 × 23,789,753 = 214,107,777
13 × 16,469,829 = 214,107,777
39 × 5,489,943 = 214,107,777
117 × 1,829,981 = 214,107,777
1,229 × 174,213 = 214,107,777
1,489 × 143,793 = 214,107,777
3,687 × 58,071 = 214,107,777
4,467 × 47,931 = 214,107,777
11,061 × 19,357 = 214,107,777
13,401 × 15,977 = 214,107,777
12 unique multiplications The final answer:
(scroll down)