Q. 1383.6( 7 Votes )

# The number of factors of a prime number is_____.

Answer :

The number of factors of a prime number is 2.

Each prime number has only two factors : 1 and the number itself.

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The number of common prime factors of 75, 60, and 105 is

NCERT - Exemplar MathematicsA number is divisible by 5 and 6. It may not be divisible by

NCERT - Exemplar MathematicsExpress each of the following numbers as the sum of three odd primes:

(a) 21 (b) 31

(c) 53 (d) 61

NCERT - MathematicsIn which of the following expressions, prime factorisation has been done?

(a) 24 = 2 × 3 × 4

(b) 56 = 7 × 2 × 2 × 2

(c) 70 = 2 × 5 × 7

(d) 54 = 2 × 3 × 9

NCERT - MathematicsFind all the prime factors of 1729 and arrange them in ascending order. Now state the relation, if any; between two consecutive prime factors.

NCERT - MathematicsFind first three common multiples of:

(a) 6 and 8 (b) 12 and 18

NCERT - MathematicsWrite five pairs of prime numbers below 20 whose sum is divisible by 5.

NCERT - MathematicsA number for which the sum of all its factors is equal to twice the number is called a _____ number.

NCERT - Exemplar Mathematics