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).
1,2,3,4,6,8,12,24
There are 5280 feet per mile, so: 7920/5280 = 1.5 miles in 7920 feet.
1, 3, 9 and 27
1, 2, 3, 4, 6, 8, 12, 24 (sum = 60)
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.
7920 miles = 12,746 kilometres
1,2,3,4,6,8,12,24
There are 16 ounces in one pound. Therefore, 7920 ounces is equal to 7920 / 16 = 495 pounds.
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.
There are 5280 feet per mile, so: 7920/5280 = 1.5 miles in 7920 feet.
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.
There are 304.8 millimetres in 1 foot. i.e. you need to multiply 7920 by 304.8 here. This gives you 2,414,016 millimetres in 7920 feet.
There are 5280 feet in one mile. Therefore, 7920 feet is equal to 7920 / 5280 = 1.5 miles.
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.