To find all the divisors of the number 6,879,376:
- 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 6,879,376:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
6,879,376 = 24 × 7 × 239 × 257
6,879,376 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 = (4 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 5 × 2 × 2 × 2 = 40
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 6,879,376
- 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 =
7
composite factor = 2
3 =
8
composite factor = 2 × 7 =
14
composite factor = 2
4 =
16
composite factor = 2
2 × 7 =
28
composite factor = 2
3 × 7 =
56
composite factor = 2
4 × 7 =
112
prime factor =
239
prime factor =
257
composite factor = 2 × 239 =
478
composite factor = 2 × 257 =
514
composite factor = 2
2 × 239 =
956
composite factor = 2
2 × 257 =
1,028
composite factor = 7 × 239 =
1,673
composite factor = 7 × 257 =
1,799
composite factor = 2
3 × 239 =
1,912
composite factor = 2
3 × 257 =
2,056
This list continues below...
... This list continues from above
composite factor = 2 × 7 × 239 =
3,346
composite factor = 2 × 7 × 257 =
3,598
composite factor = 2
4 × 239 =
3,824
composite factor = 2
4 × 257 =
4,112
composite factor = 2
2 × 7 × 239 =
6,692
composite factor = 2
2 × 7 × 257 =
7,196
composite factor = 2
3 × 7 × 239 =
13,384
composite factor = 2
3 × 7 × 257 =
14,392
composite factor = 2
4 × 7 × 239 =
26,768
composite factor = 2
4 × 7 × 257 =
28,784
composite factor = 239 × 257 =
61,423
composite factor = 2 × 239 × 257 =
122,846
composite factor = 2
2 × 239 × 257 =
245,692
composite factor = 7 × 239 × 257 =
429,961
composite factor = 2
3 × 239 × 257 =
491,384
composite factor = 2 × 7 × 239 × 257 =
859,922
composite factor = 2
4 × 239 × 257 =
982,768
composite factor = 2
2 × 7 × 239 × 257 =
1,719,844
composite factor = 2
3 × 7 × 239 × 257 =
3,439,688
composite factor = 2
4 × 7 × 239 × 257 =
6,879,376
40 factors (divisors)
What times what is 6,879,376?
What number multiplied by what number equals 6,879,376?
All the combinations of any two natural numbers whose product equals 6,879,376.
1 × 6,879,376 = 6,879,376
2 × 3,439,688 = 6,879,376
4 × 1,719,844 = 6,879,376
7 × 982,768 = 6,879,376
8 × 859,922 = 6,879,376
14 × 491,384 = 6,879,376
16 × 429,961 = 6,879,376
28 × 245,692 = 6,879,376
56 × 122,846 = 6,879,376
112 × 61,423 = 6,879,376
239 × 28,784 = 6,879,376
257 × 26,768 = 6,879,376
478 × 14,392 = 6,879,376
514 × 13,384 = 6,879,376
956 × 7,196 = 6,879,376
1,028 × 6,692 = 6,879,376
1,673 × 4,112 = 6,879,376
1,799 × 3,824 = 6,879,376
1,912 × 3,598 = 6,879,376
2,056 × 3,346 = 6,879,376
20 unique multiplications The final answer:
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