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What are perfect divisors?
An example - the divisors of 28 are 1 -2 - 4 - 7 - 14 and 28. In other words 1+2+4+7+14 = 28
How is 20 a perfect number?
It isn't a perfect number.A perfect number is a number which is the sum of its proper divisors (including 1, but excluding itself).The divisors of 20 are 1, 2, 4, 5, 10.1 + 2 + 4 + 5 + 10 = 22 => 20 is not a perfect number.An example of a perfect number is 28:The divisors of 28 are 1, 2, 4, 7, 141 + 2 + 4 + 7 + 14 = 28 => 28 is a perfect number.
What are the divisors of 84?
1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
Is 812 divisible by 4?
812 is not divisible by 9. The divisors of 812 are 1, 2, 4, 7, 14, 28, 29, 58, 116, 203, 406, and 812.
Which group sHow is all the whole number factors of a composite number 123458 16 or 1234561020 or 1234681224 or 123471428?
numbers 1, 2, 3, 4, 5, 8, 16 are divisors number 16 numbers 1, 2, 3, 4, 5, 6, 10, 20 are divisors number 20 numbers 1, 2, 3, 4, 6, 8, 12, 24 are divisors number 24 numbers 1, 2, 3, 4, 7, 12, 28 are divisors number 28 next number is 32 and divisors are 1, 2, 4, 8, 16, 32
