To find all the divisors of the number 7,400,000,020:
- 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 7,400,000,020:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
7,400,000,020 = 22 × 5 × 7 × 97 × 544,919
7,400,000,020 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 7,400,000,020
- 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
prime factor =
7
composite factor = 2 × 5 =
10
composite factor = 2 × 7 =
14
composite factor = 2
2 × 5 =
20
composite factor = 2
2 × 7 =
28
composite factor = 5 × 7 =
35
composite factor = 2 × 5 × 7 =
70
prime factor =
97
composite factor = 2
2 × 5 × 7 =
140
composite factor = 2 × 97 =
194
composite factor = 2
2 × 97 =
388
composite factor = 5 × 97 =
485
composite factor = 7 × 97 =
679
composite factor = 2 × 5 × 97 =
970
composite factor = 2 × 7 × 97 =
1,358
composite factor = 2
2 × 5 × 97 =
1,940
composite factor = 2
2 × 7 × 97 =
2,716
composite factor = 5 × 7 × 97 =
3,395
composite factor = 2 × 5 × 7 × 97 =
6,790
composite factor = 2
2 × 5 × 7 × 97 =
13,580
This list continues below...
... This list continues from above
prime factor =
544,919
composite factor = 2 × 544,919 =
1,089,838
composite factor = 2
2 × 544,919 =
2,179,676
composite factor = 5 × 544,919 =
2,724,595
composite factor = 7 × 544,919 =
3,814,433
composite factor = 2 × 5 × 544,919 =
5,449,190
composite factor = 2 × 7 × 544,919 =
7,628,866
composite factor = 2
2 × 5 × 544,919 =
10,898,380
composite factor = 2
2 × 7 × 544,919 =
15,257,732
composite factor = 5 × 7 × 544,919 =
19,072,165
composite factor = 2 × 5 × 7 × 544,919 =
38,144,330
composite factor = 97 × 544,919 =
52,857,143
composite factor = 2
2 × 5 × 7 × 544,919 =
76,288,660
composite factor = 2 × 97 × 544,919 =
105,714,286
composite factor = 2
2 × 97 × 544,919 =
211,428,572
composite factor = 5 × 97 × 544,919 =
264,285,715
composite factor = 7 × 97 × 544,919 =
370,000,001
composite factor = 2 × 5 × 97 × 544,919 =
528,571,430
composite factor = 2 × 7 × 97 × 544,919 =
740,000,002
composite factor = 2
2 × 5 × 97 × 544,919 =
1,057,142,860
composite factor = 2
2 × 7 × 97 × 544,919 =
1,480,000,004
composite factor = 5 × 7 × 97 × 544,919 =
1,850,000,005
composite factor = 2 × 5 × 7 × 97 × 544,919 =
3,700,000,010
composite factor = 2
2 × 5 × 7 × 97 × 544,919 =
7,400,000,020
48 factors (divisors)
What times what is 7,400,000,020?
What number multiplied by what number equals 7,400,000,020?
All the combinations of any two natural numbers whose product equals 7,400,000,020.
1 × 7,400,000,020 = 7,400,000,020
2 × 3,700,000,010 = 7,400,000,020
4 × 1,850,000,005 = 7,400,000,020
5 × 1,480,000,004 = 7,400,000,020
7 × 1,057,142,860 = 7,400,000,020
10 × 740,000,002 = 7,400,000,020
14 × 528,571,430 = 7,400,000,020
20 × 370,000,001 = 7,400,000,020
28 × 264,285,715 = 7,400,000,020
35 × 211,428,572 = 7,400,000,020
70 × 105,714,286 = 7,400,000,020
97 × 76,288,660 = 7,400,000,020
140 × 52,857,143 = 7,400,000,020
194 × 38,144,330 = 7,400,000,020
388 × 19,072,165 = 7,400,000,020
485 × 15,257,732 = 7,400,000,020
679 × 10,898,380 = 7,400,000,020
970 × 7,628,866 = 7,400,000,020
1,358 × 5,449,190 = 7,400,000,020
1,940 × 3,814,433 = 7,400,000,020
2,716 × 2,724,595 = 7,400,000,020
3,395 × 2,179,676 = 7,400,000,020
6,790 × 1,089,838 = 7,400,000,020
13,580 × 544,919 = 7,400,000,020
24 unique multiplications The final answer:
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