To find all the divisors of the number 43,900,140:
- 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 43,900,140:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
43,900,140 = 22 × 3 × 5 × 89 × 8,221
43,900,140 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) × (1 + 1) = 3 × 2 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 43,900,140
- 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 =
3
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2 × 3 =
6
composite factor = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
composite factor = 2
2 × 5 =
20
composite factor = 2 × 3 × 5 =
30
composite factor = 2
2 × 3 × 5 =
60
prime factor =
89
composite factor = 2 × 89 =
178
composite factor = 3 × 89 =
267
composite factor = 2
2 × 89 =
356
composite factor = 5 × 89 =
445
composite factor = 2 × 3 × 89 =
534
composite factor = 2 × 5 × 89 =
890
composite factor = 2
2 × 3 × 89 =
1,068
composite factor = 3 × 5 × 89 =
1,335
composite factor = 2
2 × 5 × 89 =
1,780
composite factor = 2 × 3 × 5 × 89 =
2,670
composite factor = 2
2 × 3 × 5 × 89 =
5,340
This list continues below...
... This list continues from above
prime factor =
8,221
composite factor = 2 × 8,221 =
16,442
composite factor = 3 × 8,221 =
24,663
composite factor = 2
2 × 8,221 =
32,884
composite factor = 5 × 8,221 =
41,105
composite factor = 2 × 3 × 8,221 =
49,326
composite factor = 2 × 5 × 8,221 =
82,210
composite factor = 2
2 × 3 × 8,221 =
98,652
composite factor = 3 × 5 × 8,221 =
123,315
composite factor = 2
2 × 5 × 8,221 =
164,420
composite factor = 2 × 3 × 5 × 8,221 =
246,630
composite factor = 2
2 × 3 × 5 × 8,221 =
493,260
composite factor = 89 × 8,221 =
731,669
composite factor = 2 × 89 × 8,221 =
1,463,338
composite factor = 3 × 89 × 8,221 =
2,195,007
composite factor = 2
2 × 89 × 8,221 =
2,926,676
composite factor = 5 × 89 × 8,221 =
3,658,345
composite factor = 2 × 3 × 89 × 8,221 =
4,390,014
composite factor = 2 × 5 × 89 × 8,221 =
7,316,690
composite factor = 2
2 × 3 × 89 × 8,221 =
8,780,028
composite factor = 3 × 5 × 89 × 8,221 =
10,975,035
composite factor = 2
2 × 5 × 89 × 8,221 =
14,633,380
composite factor = 2 × 3 × 5 × 89 × 8,221 =
21,950,070
composite factor = 2
2 × 3 × 5 × 89 × 8,221 =
43,900,140
48 factors (divisors)
What times what is 43,900,140?
What number multiplied by what number equals 43,900,140?
All the combinations of any two natural numbers whose product equals 43,900,140.
1 × 43,900,140 = 43,900,140
2 × 21,950,070 = 43,900,140
3 × 14,633,380 = 43,900,140
4 × 10,975,035 = 43,900,140
5 × 8,780,028 = 43,900,140
6 × 7,316,690 = 43,900,140
10 × 4,390,014 = 43,900,140
12 × 3,658,345 = 43,900,140
15 × 2,926,676 = 43,900,140
20 × 2,195,007 = 43,900,140
30 × 1,463,338 = 43,900,140
60 × 731,669 = 43,900,140
89 × 493,260 = 43,900,140
178 × 246,630 = 43,900,140
267 × 164,420 = 43,900,140
356 × 123,315 = 43,900,140
445 × 98,652 = 43,900,140
534 × 82,210 = 43,900,140
890 × 49,326 = 43,900,140
1,068 × 41,105 = 43,900,140
1,335 × 32,884 = 43,900,140
1,780 × 24,663 = 43,900,140
2,670 × 16,442 = 43,900,140
5,340 × 8,221 = 43,900,140
24 unique multiplications The final answer:
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