Q: What is the sum of all the positive divisors of 72?

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72 is an abundant number because the sum of its positive divisors, not including 72 itself, is larger than 72. Positive divisors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. 1 + 2 + 3 + 4 + 6 + 8 + 9 + 12 + 18 + 24 + 36 = 123 > 72 (if an integer is larger than the sum of its positive divisors , not including the integer itself, then that integer is called a deficient number, such as prime or power of prime numbers or numbers like 10 are).

72.

The sum of 72 and 12 is 84. The product of the two numbers is 864.

81

Presumably the sum is -222, as defined by the question!

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72 is an abundant number because the sum of its positive divisors, not including 72 itself, is larger than 72. Positive divisors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. 1 + 2 + 3 + 4 + 6 + 8 + 9 + 12 + 18 + 24 + 36 = 123 > 72 (if an integer is larger than the sum of its positive divisors , not including the integer itself, then that integer is called a deficient number, such as prime or power of prime numbers or numbers like 10 are).

72 is an abundant number because the sum of its positive divisors, not including 72 itself, is larger than 72. Positive divisors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. 1 + 2 + 3 + 4 + 6 + 8 + 9 + 12 + 18 + 24 + 36 = 123 > 72 (if an integer is larger than the sum of its positive divisors , not including the integer itself, then that integer is called a deficient number, such as prime or power of prime numbers or numbers like 10 are).

The sum of the positive whole-number factors of 30 is 72.

Here are the factors of 72: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72 Some people leave 1 and/or the number itself out when totaling. I'll leave that up to you.

62 + 72 = 85

The positive divisors of 30 are 1, 2, 3, 5, 6, 10, 15 and 30. Thus d(30) = number of such divisors=8, ľ(30) = sum of such divisors=72 and ľ2(30) = sum of squares of such divisors= 1 + 4 + 9 + 25 + 100 + 225 + 900 = 1300. From the formula, since 30=2.3.5, we have d(30 = (1 + 1)(1 + 1)(1 + 1) = 8; ľ(30 = 22 ˇ1 2ˇ1 : 32 ˇ1 3ˇ1 : 52 ˇ1 5ˇ1 = 3 1 : 8 2 : 24 4 = 72 and ľ2(30) = 24 ˇ1 22 ˇ1 : 34 ˇ1 32 ˇ1 : 54 ˇ1 52 ˇ1 = 15 3 : 80 8 : 624 24 = 5:10:26 = 1300.

72.

The greatest common factor of 42 and 72 is 6 Gcf stands for Greatest Common Factor, The gcf of 42 and 72 is the largest positive number that is a factor of both 42 and 72. The positive factors of 42 (the integral divisors of 42) are: 1, 2, 3, 6, 7, 14, 21, and 42. The positive factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 36, and 72. Therefore the gcf of 42 and 72 is 6, as the greatest factor that 42 and 72 have in common.

1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72

the sum is 72

The sum of 72 and 12 is 84. The product of the two numbers is 864.

The sum of 84 and 72 is 156.