To find all the divisors of the number 37,235,680:
- 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 37,235,680:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
37,235,680 = 25 × 5 × 53 × 4,391
37,235,680 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 = (5 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 6 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 37,235,680
- 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
4 =
16
composite factor = 2
2 × 5 =
20
composite factor = 2
5 =
32
composite factor = 2
3 × 5 =
40
prime factor =
53
composite factor = 2
4 × 5 =
80
composite factor = 2 × 53 =
106
composite factor = 2
5 × 5 =
160
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
4 × 53 =
848
composite factor = 2
2 × 5 × 53 =
1,060
composite factor = 2
5 × 53 =
1,696
composite factor = 2
3 × 5 × 53 =
2,120
composite factor = 2
4 × 5 × 53 =
4,240
prime factor =
4,391
This list continues below...
... This list continues from above
composite factor = 2
5 × 5 × 53 =
8,480
composite factor = 2 × 4,391 =
8,782
composite factor = 2
2 × 4,391 =
17,564
composite factor = 5 × 4,391 =
21,955
composite factor = 2
3 × 4,391 =
35,128
composite factor = 2 × 5 × 4,391 =
43,910
composite factor = 2
4 × 4,391 =
70,256
composite factor = 2
2 × 5 × 4,391 =
87,820
composite factor = 2
5 × 4,391 =
140,512
composite factor = 2
3 × 5 × 4,391 =
175,640
composite factor = 53 × 4,391 =
232,723
composite factor = 2
4 × 5 × 4,391 =
351,280
composite factor = 2 × 53 × 4,391 =
465,446
composite factor = 2
5 × 5 × 4,391 =
702,560
composite factor = 2
2 × 53 × 4,391 =
930,892
composite factor = 5 × 53 × 4,391 =
1,163,615
composite factor = 2
3 × 53 × 4,391 =
1,861,784
composite factor = 2 × 5 × 53 × 4,391 =
2,327,230
composite factor = 2
4 × 53 × 4,391 =
3,723,568
composite factor = 2
2 × 5 × 53 × 4,391 =
4,654,460
composite factor = 2
5 × 53 × 4,391 =
7,447,136
composite factor = 2
3 × 5 × 53 × 4,391 =
9,308,920
composite factor = 2
4 × 5 × 53 × 4,391 =
18,617,840
composite factor = 2
5 × 5 × 53 × 4,391 =
37,235,680
48 factors (divisors)
What times what is 37,235,680?
What number multiplied by what number equals 37,235,680?
All the combinations of any two natural numbers whose product equals 37,235,680.
1 × 37,235,680 = 37,235,680
2 × 18,617,840 = 37,235,680
4 × 9,308,920 = 37,235,680
5 × 7,447,136 = 37,235,680
8 × 4,654,460 = 37,235,680
10 × 3,723,568 = 37,235,680
16 × 2,327,230 = 37,235,680
20 × 1,861,784 = 37,235,680
32 × 1,163,615 = 37,235,680
40 × 930,892 = 37,235,680
53 × 702,560 = 37,235,680
80 × 465,446 = 37,235,680
106 × 351,280 = 37,235,680
160 × 232,723 = 37,235,680
212 × 175,640 = 37,235,680
265 × 140,512 = 37,235,680
424 × 87,820 = 37,235,680
530 × 70,256 = 37,235,680
848 × 43,910 = 37,235,680
1,060 × 35,128 = 37,235,680
1,696 × 21,955 = 37,235,680
2,120 × 17,564 = 37,235,680
4,240 × 8,782 = 37,235,680
4,391 × 8,480 = 37,235,680
24 unique multiplications The final answer:
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