To find all the divisors of the number 9,877,520:
- 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 9,877,520:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
9,877,520 = 24 × 5 × 37 × 47 × 71
9,877,520 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) × (1 + 1) = 5 × 2 × 2 × 2 × 2 = 80
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 9,877,520
- 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
prime factor =
37
composite factor = 2
3 × 5 =
40
prime factor =
47
prime factor =
71
composite factor = 2 × 37 =
74
composite factor = 2
4 × 5 =
80
composite factor = 2 × 47 =
94
composite factor = 2 × 71 =
142
composite factor = 2
2 × 37 =
148
composite factor = 5 × 37 =
185
composite factor = 2
2 × 47 =
188
composite factor = 5 × 47 =
235
composite factor = 2
2 × 71 =
284
composite factor = 2
3 × 37 =
296
composite factor = 5 × 71 =
355
composite factor = 2 × 5 × 37 =
370
composite factor = 2
3 × 47 =
376
composite factor = 2 × 5 × 47 =
470
composite factor = 2
3 × 71 =
568
composite factor = 2
4 × 37 =
592
composite factor = 2 × 5 × 71 =
710
composite factor = 2
2 × 5 × 37 =
740
composite factor = 2
4 × 47 =
752
composite factor = 2
2 × 5 × 47 =
940
composite factor = 2
4 × 71 =
1,136
composite factor = 2
2 × 5 × 71 =
1,420
composite factor = 2
3 × 5 × 37 =
1,480
composite factor = 37 × 47 =
1,739
composite factor = 2
3 × 5 × 47 =
1,880
composite factor = 37 × 71 =
2,627
composite factor = 2
3 × 5 × 71 =
2,840
composite factor = 2
4 × 5 × 37 =
2,960
This list continues below...
... This list continues from above
composite factor = 47 × 71 =
3,337
composite factor = 2 × 37 × 47 =
3,478
composite factor = 2
4 × 5 × 47 =
3,760
composite factor = 2 × 37 × 71 =
5,254
composite factor = 2
4 × 5 × 71 =
5,680
composite factor = 2 × 47 × 71 =
6,674
composite factor = 2
2 × 37 × 47 =
6,956
composite factor = 5 × 37 × 47 =
8,695
composite factor = 2
2 × 37 × 71 =
10,508
composite factor = 5 × 37 × 71 =
13,135
composite factor = 2
2 × 47 × 71 =
13,348
composite factor = 2
3 × 37 × 47 =
13,912
composite factor = 5 × 47 × 71 =
16,685
composite factor = 2 × 5 × 37 × 47 =
17,390
composite factor = 2
3 × 37 × 71 =
21,016
composite factor = 2 × 5 × 37 × 71 =
26,270
composite factor = 2
3 × 47 × 71 =
26,696
composite factor = 2
4 × 37 × 47 =
27,824
composite factor = 2 × 5 × 47 × 71 =
33,370
composite factor = 2
2 × 5 × 37 × 47 =
34,780
composite factor = 2
4 × 37 × 71 =
42,032
composite factor = 2
2 × 5 × 37 × 71 =
52,540
composite factor = 2
4 × 47 × 71 =
53,392
composite factor = 2
2 × 5 × 47 × 71 =
66,740
composite factor = 2
3 × 5 × 37 × 47 =
69,560
composite factor = 2
3 × 5 × 37 × 71 =
105,080
composite factor = 37 × 47 × 71 =
123,469
composite factor = 2
3 × 5 × 47 × 71 =
133,480
composite factor = 2
4 × 5 × 37 × 47 =
139,120
composite factor = 2
4 × 5 × 37 × 71 =
210,160
composite factor = 2 × 37 × 47 × 71 =
246,938
composite factor = 2
4 × 5 × 47 × 71 =
266,960
composite factor = 2
2 × 37 × 47 × 71 =
493,876
composite factor = 5 × 37 × 47 × 71 =
617,345
composite factor = 2
3 × 37 × 47 × 71 =
987,752
composite factor = 2 × 5 × 37 × 47 × 71 =
1,234,690
composite factor = 2
4 × 37 × 47 × 71 =
1,975,504
composite factor = 2
2 × 5 × 37 × 47 × 71 =
2,469,380
composite factor = 2
3 × 5 × 37 × 47 × 71 =
4,938,760
composite factor = 2
4 × 5 × 37 × 47 × 71 =
9,877,520
80 factors (divisors)
What times what is 9,877,520?
What number multiplied by what number equals 9,877,520?
All the combinations of any two natural numbers whose product equals 9,877,520.
1 × 9,877,520 = 9,877,520
2 × 4,938,760 = 9,877,520
4 × 2,469,380 = 9,877,520
5 × 1,975,504 = 9,877,520
8 × 1,234,690 = 9,877,520
10 × 987,752 = 9,877,520
16 × 617,345 = 9,877,520
20 × 493,876 = 9,877,520
37 × 266,960 = 9,877,520
40 × 246,938 = 9,877,520
47 × 210,160 = 9,877,520
71 × 139,120 = 9,877,520
74 × 133,480 = 9,877,520
80 × 123,469 = 9,877,520
94 × 105,080 = 9,877,520
142 × 69,560 = 9,877,520
148 × 66,740 = 9,877,520
185 × 53,392 = 9,877,520
188 × 52,540 = 9,877,520
235 × 42,032 = 9,877,520
284 × 34,780 = 9,877,520
296 × 33,370 = 9,877,520
355 × 27,824 = 9,877,520
370 × 26,696 = 9,877,520
376 × 26,270 = 9,877,520
470 × 21,016 = 9,877,520
568 × 17,390 = 9,877,520
592 × 16,685 = 9,877,520
710 × 13,912 = 9,877,520
740 × 13,348 = 9,877,520
752 × 13,135 = 9,877,520
940 × 10,508 = 9,877,520
1,136 × 8,695 = 9,877,520
1,420 × 6,956 = 9,877,520
1,480 × 6,674 = 9,877,520
1,739 × 5,680 = 9,877,520
1,880 × 5,254 = 9,877,520
2,627 × 3,760 = 9,877,520
2,840 × 3,478 = 9,877,520
2,960 × 3,337 = 9,877,520
40 unique multiplications The final answer:
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