To find all the divisors of the number 85,000,000,490:
- 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 85,000,000,490:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
85,000,000,490 = 2 × 5 × 349 × 2,833 × 8,597
85,000,000,490 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 = (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 2 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 85,000,000,490
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- 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 =
5
composite factor = 2 × 5 =
10
prime factor =
349
composite factor = 2 × 349 =
698
composite factor = 5 × 349 =
1,745
prime factor =
2,833
composite factor = 2 × 5 × 349 =
3,490
composite factor = 2 × 2,833 =
5,666
prime factor =
8,597
composite factor = 5 × 2,833 =
14,165
composite factor = 2 × 8,597 =
17,194
composite factor = 2 × 5 × 2,833 =
28,330
composite factor = 5 × 8,597 =
42,985
composite factor = 2 × 5 × 8,597 =
85,970
This list continues below...
... This list continues from above
composite factor = 349 × 2,833 =
988,717
composite factor = 2 × 349 × 2,833 =
1,977,434
composite factor = 349 × 8,597 =
3,000,353
composite factor = 5 × 349 × 2,833 =
4,943,585
composite factor = 2 × 349 × 8,597 =
6,000,706
composite factor = 2 × 5 × 349 × 2,833 =
9,887,170
composite factor = 5 × 349 × 8,597 =
15,001,765
composite factor = 2,833 × 8,597 =
24,355,301
composite factor = 2 × 5 × 349 × 8,597 =
30,003,530
composite factor = 2 × 2,833 × 8,597 =
48,710,602
composite factor = 5 × 2,833 × 8,597 =
121,776,505
composite factor = 2 × 5 × 2,833 × 8,597 =
243,553,010
composite factor = 349 × 2,833 × 8,597 =
8,500,000,049
composite factor = 2 × 349 × 2,833 × 8,597 =
17,000,000,098
composite factor = 5 × 349 × 2,833 × 8,597 =
42,500,000,245
composite factor = 2 × 5 × 349 × 2,833 × 8,597 =
85,000,000,490
32 factors (divisors)
What times what is 85,000,000,490?
What number multiplied by what number equals 85,000,000,490?
All the combinations of any two natural numbers whose product equals 85,000,000,490.
1 × 85,000,000,490 = 85,000,000,490
2 × 42,500,000,245 = 85,000,000,490
5 × 17,000,000,098 = 85,000,000,490
10 × 8,500,000,049 = 85,000,000,490
349 × 243,553,010 = 85,000,000,490
698 × 121,776,505 = 85,000,000,490
1,745 × 48,710,602 = 85,000,000,490
2,833 × 30,003,530 = 85,000,000,490
3,490 × 24,355,301 = 85,000,000,490
5,666 × 15,001,765 = 85,000,000,490
8,597 × 9,887,170 = 85,000,000,490
14,165 × 6,000,706 = 85,000,000,490
17,194 × 4,943,585 = 85,000,000,490
28,330 × 3,000,353 = 85,000,000,490
42,985 × 1,977,434 = 85,000,000,490
85,970 × 988,717 = 85,000,000,490
16 unique multiplications The final answer:
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