To find all the divisors of the number 12,900,000,040:
- 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 12,900,000,040:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
12,900,000,040 = 23 × 5 × 10,069 × 32,029
12,900,000,040 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 12,900,000,040
- 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 =
10,069
composite factor = 2 × 10,069 =
20,138
prime factor =
32,029
composite factor = 2
2 × 10,069 =
40,276
composite factor = 5 × 10,069 =
50,345
composite factor = 2 × 32,029 =
64,058
composite factor = 2
3 × 10,069 =
80,552
composite factor = 2 × 5 × 10,069 =
100,690
This list continues below...
... This list continues from above
composite factor = 2
2 × 32,029 =
128,116
composite factor = 5 × 32,029 =
160,145
composite factor = 2
2 × 5 × 10,069 =
201,380
composite factor = 2
3 × 32,029 =
256,232
composite factor = 2 × 5 × 32,029 =
320,290
composite factor = 2
3 × 5 × 10,069 =
402,760
composite factor = 2
2 × 5 × 32,029 =
640,580
composite factor = 2
3 × 5 × 32,029 =
1,281,160
composite factor = 10,069 × 32,029 =
322,500,001
composite factor = 2 × 10,069 × 32,029 =
645,000,002
composite factor = 2
2 × 10,069 × 32,029 =
1,290,000,004
composite factor = 5 × 10,069 × 32,029 =
1,612,500,005
composite factor = 2
3 × 10,069 × 32,029 =
2,580,000,008
composite factor = 2 × 5 × 10,069 × 32,029 =
3,225,000,010
composite factor = 2
2 × 5 × 10,069 × 32,029 =
6,450,000,020
composite factor = 2
3 × 5 × 10,069 × 32,029 =
12,900,000,040
32 factors (divisors)
What times what is 12,900,000,040?
What number multiplied by what number equals 12,900,000,040?
All the combinations of any two natural numbers whose product equals 12,900,000,040.
1 × 12,900,000,040 = 12,900,000,040
2 × 6,450,000,020 = 12,900,000,040
4 × 3,225,000,010 = 12,900,000,040
5 × 2,580,000,008 = 12,900,000,040
8 × 1,612,500,005 = 12,900,000,040
10 × 1,290,000,004 = 12,900,000,040
20 × 645,000,002 = 12,900,000,040
40 × 322,500,001 = 12,900,000,040
10,069 × 1,281,160 = 12,900,000,040
20,138 × 640,580 = 12,900,000,040
32,029 × 402,760 = 12,900,000,040
40,276 × 320,290 = 12,900,000,040
50,345 × 256,232 = 12,900,000,040
64,058 × 201,380 = 12,900,000,040
80,552 × 160,145 = 12,900,000,040
100,690 × 128,116 = 12,900,000,040
16 unique multiplications The final answer:
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