How Many Factors Does 360 Have? Count Them in 10 Seconds | MATHCOUNTS & AMC 8 Trick

How many numbers divide evenly into 72? Don't list them, count them! Break the number into primes, add 1 to each count, and multiply. Siggy shows you how. 0:00 How many divide 72? 0:26 Trick #26: counting divisors 0:36 72 → 12 divisors 1:09 Your turn: 40 1:29 Why it works 1:53 Only one prime: 32 2:12 Boss level: 360 2:43 Your challenge + next time Comment your challenge answer! Subscribe to Math Sigmas for a new trick every week. #mentalmath #mathtricks #mathforkids