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There is a formula to calculate even perfect numbers, 2p-1(2p - 1) where p is a Prime number.
When p = 7 then 26(27 - 1) = 64 x 127 = 8128
So 8128 is the 4th perfect number.
(The other three occur when p = 2, 3 and 5)
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Continue Learning about Math & Arithmetic
Is 8128 a abundant deficient or perfect number?
abundant since sum of divisors is 16256
Is 22 a perfect number or a near number?
22 is not a perfect number but 6, 28, 496 and 8128 are perfect numbers.
What are the first 5 perfect number?
6, 28, 496, 8128, 33550336
Can you find a perfect number greater than 30?
496, 8128, 33550336, 8589869056, 137438691328, 2305843008139952128
Is 495 a perfect number?
No, it isn't. In fact, it is not known whether are odd perfect numbers exist. The first perfect numbers are 6, 28, 496, and 8128.
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