172178

172178 is a positive integer in the decimal system. It lies between 172177 and 172179 and is an even composite number.

Its prime factorization is 172178 = 2 × 19 × 23 × 197. All prime factors are distinct, so the number is squarefree. Because of this factorization, 172178 has 16 positive divisors.

The sum of all positive divisors, denoted sigma(172178), is (1+2) × (1+19) × (1+23) × (1+197) = 3 × 20 × 24 × 198 = 285120. The sum of proper divisors is 285120 − 172178 = 112942. Since this sum is less than the number itself, 172178 is classified as a deficient number (not perfect and not abundant).

In terms of representation, the digits of the number are 1, 7, 2, 1, 7, 8. The number is even and not divisible by 3 or 5, as indicated by its digit sum and last digit.

In mathematics, 172178 serves as an example of a squarefree composite with multiple distinct prime factors, illustrating how divisor functions and factorization properties behave for such numbers. There is no widely noted historical or cultural significance associated with this specific integer.

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