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Q: How many proper divisors are in 7920?

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To find the number of divisors of a number, factor it into primes in power format; then the number of factors the number has is the product of the powers of the primes each incremented by 1. To find the proper divisors subtract one from thin number. The prime factorization of 7920 is 2^4 x 3^2 x 5 x 11, so it has (4 + 1) × (2 + 1) × (1 + 1) × (1 + 1) = 5 × 3 × 2 × 2 = 60 factors. As this includes the number itself and the proper factors of a number exclude the number, 7920 has 60 - 1 = 59 proper factors (divisors).

120,000 has 70 proper divisors.

A perfect number equals the sum of its proper divisors. A deficient number is greater than the sum of its proper divisors. An abundant number is less than the sum of its proper divisors. Proper divisors of a number do not include the number itself.

7,920 has 60 divisors: 1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 30 33 36 40 44 45 48 55 60 66 72 80 88 90 99 110 120 132 144 165 176 180 198 220 240 264 330 360 396 440 495 528 660 720 792 880 990 1320 1584 1980 2640 3960 7920.

7920 inches 7920 inches

1,2,3,4,6,8,12,24

7920 miles = 12,746 kilometres

7,920 has 60 divisors: 1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 30 33 36 40 44 45 48 55 60 66 72 80 88 90 99 110 120 132 144 165 176 180 198 220 240 264 330 360 396 440 495 528 660 720 792 880 990 1320 1584 1980 2640 3960 7920.

A perfect number is the term for a number that is equal to the sum of its proper divisors. Be careful not to confuse that with proper factors. Proper divisors include 1 but not the number itself. Proper factors don't include either I or the original number.

There are 5280 feet in one mile. Therefore, 7920 feet is equal to 7920 / 5280 = 1.5 miles.

There are 1760 yards in one mile. Therefore, 7920 yards is equal to 7920/1760 = 4.5 miles.

There are 5280 feet in one mile. Therefore, 7920 feet is equal to 7920 / 5280 = 1.5 miles.

There are 16 ounces in one pound. Therefore, 7920 ounces is equal to 7920 / 16 = 495 pounds.

You calculate proper divisors by finding the factors of a number and excluding the number itself. If you want to add them all, just add all the factors except the number together.

1, 2, 3, 4, 6, 8, 12, 24 (sum = 60)

Any other rational number other than 0 itself is a divisor of zero.

Amicable numbers are pairs of numbers for which the sum of the proper divisors (the divisors except for the number itself) equals the other number in the pair. The smallest amicable pair is 220 and 284. The proper divisors of 220 are and the factors of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, and 110, the sum of which is 284. The proper divisors of 284 are 1, 2, 4, 71, and 142, the sum of which is 220.

1, 3, 9 and 27

There are 5280 feet per mile, so: 7920/5280 = 1.5 miles in 7920 feet.

That is a list of the proper divisors of 588. Most definitions of proper factors do not include the number 1.

Perfect number (and it's proper divisors not proper factors)

A perfect number is equal to the sum of its proper divisors (the factors excluding the number itself.) 6 is a perfect number. Its proper divisors are 1, 2 and 3.

2,835 has 20 divisors.

Six divisors for 2012.

136 has eight divisors.