To find all the divisors of the number 3,970,760:
- 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 3,970,760:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
3,970,760 = 23 × 5 × 53 × 1,873
3,970,760 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 = (3 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 4 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 3,970,760
- 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 =
5
composite factor = 2
3 =
8
composite factor = 2 × 5 =
10
composite factor = 2
2 × 5 =
20
composite factor = 2
3 × 5 =
40
prime factor =
53
composite factor = 2 × 53 =
106
composite factor = 2
2 × 53 =
212
composite factor = 5 × 53 =
265
composite factor = 2
3 × 53 =
424
composite factor = 2 × 5 × 53 =
530
composite factor = 2
2 × 5 × 53 =
1,060
prime factor =
1,873
This list continues below...
... This list continues from above
composite factor = 2
3 × 5 × 53 =
2,120
composite factor = 2 × 1,873 =
3,746
composite factor = 2
2 × 1,873 =
7,492
composite factor = 5 × 1,873 =
9,365
composite factor = 2
3 × 1,873 =
14,984
composite factor = 2 × 5 × 1,873 =
18,730
composite factor = 2
2 × 5 × 1,873 =
37,460
composite factor = 2
3 × 5 × 1,873 =
74,920
composite factor = 53 × 1,873 =
99,269
composite factor = 2 × 53 × 1,873 =
198,538
composite factor = 2
2 × 53 × 1,873 =
397,076
composite factor = 5 × 53 × 1,873 =
496,345
composite factor = 2
3 × 53 × 1,873 =
794,152
composite factor = 2 × 5 × 53 × 1,873 =
992,690
composite factor = 2
2 × 5 × 53 × 1,873 =
1,985,380
composite factor = 2
3 × 5 × 53 × 1,873 =
3,970,760
32 factors (divisors)
What times what is 3,970,760?
What number multiplied by what number equals 3,970,760?
All the combinations of any two natural numbers whose product equals 3,970,760.
1 × 3,970,760 = 3,970,760
2 × 1,985,380 = 3,970,760
4 × 992,690 = 3,970,760
5 × 794,152 = 3,970,760
8 × 496,345 = 3,970,760
10 × 397,076 = 3,970,760
20 × 198,538 = 3,970,760
40 × 99,269 = 3,970,760
53 × 74,920 = 3,970,760
106 × 37,460 = 3,970,760
212 × 18,730 = 3,970,760
265 × 14,984 = 3,970,760
424 × 9,365 = 3,970,760
530 × 7,492 = 3,970,760
1,060 × 3,746 = 3,970,760
1,873 × 2,120 = 3,970,760
16 unique multiplications The final answer:
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