Factors of 1980 are numbers that, when multiplied in pairs give the product as 1980. It has total 36 factors of which 1980 is the biggest factor and the prime factors of 1980 are 2, 3, 5, 11. The Prime Factorization of 1980 is 2² × 3² × 5¹ × 11¹.

• All Factors of 1980: 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990 and 1980
• Prime Factors of 1980: 2, 3, 5, 11
• Prime Factorization of 1980: 2² × 3² × 5¹ × 11¹
• Sum of Factors of 1980: 6552

1.	What Are the Factors of 1980?
2.	Factors of 1980 by Prime Factorization
3.	Factors of 1980 in Pairs
4.	FAQs on Factors of 1980

Factors of 1980 are pairs of those numbers whose products result in 1980. These factors are either prime numbers or composite numbers.

How to Find the Factors of 1980?

To find the factors of 1980, we will have to find the list of numbers that would divide 1980 without leaving any remainder.

• 1980/9 = 220; therefore, 9 is a factor of 1980 and 220 is also a factor of 1980.
• 1980/55 = 36; therefore, 55 is a factor of 1980 and 36 is also a factor of 1980.

Similarly we can find other factors. Hence, the factors of 1980 are 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980.

☛ Also Check:

• Factors of 17 - The factors of 17 are 1, 17
• Factors of 121 - The factors of 121 are 1, 11, 121
• Factors of 35 - The factors of 35 are 1, 5, 7, 35
• Factors of 57 - The factors of 57 are 1, 3, 19, 57
• Factors of 23 - The factors of 23 are 1, 23

The number 1980 is composite and therefore it will have prime factors. Now let us learn how to calculate the prime factors of 1980. The first step is to divide the number 1980 with the smallest prime factor, here it is 2. We keep dividing until it gives a non-zero remainder.

• 1980 ÷ 2 = 990
• 990 ÷ 2 = 495

Further dividing 495 by 2 gives a non-zero remainder. So we stop the process and continue dividing the number 495 by the next smallest prime factor. We stop ultimately if the next prime factor doesn't exist or when we can't divide any further.

So, the prime factorization of 1980 can be written as 2² × 3² × 5¹ × 11¹ where 2, 3, 5, 11 are prime.

Pair factors of 1980 are the pairs of numbers that when multiplied give the product 1980. The factors of 1980 in pairs are:

• 1 × 1980 = (1, 1980)
• 2 × 990 = (2, 990)
• 3 × 660 = (3, 660)
• 4 × 495 = (4, 495)
• 5 × 396 = (5, 396)
• 6 × 330 = (6, 330)
• 9 × 220 = (9, 220)
• 10 × 198 = (10, 198)
• 11 × 180 = (11, 180)
• 12 × 165 = (12, 165)
• 15 × 132 = (15, 132)
• 18 × 110 = (18, 110)
• 20 × 99 = (20, 99)
• 22 × 90 = (22, 90)
• 30 × 66 = (30, 66)
• 33 × 60 = (33, 60)
• 36 × 55 = (36, 55)
• 44 × 45 = (44, 45)

Negative pair factors of 1980 are:

• -1 × -1980 = (-1, -1980)
• -2 × -990 = (-2, -990)
• -3 × -660 = (-3, -660)
• -4 × -495 = (-4, -495)
• -5 × -396 = (-5, -396)
• -6 × -330 = (-6, -330)
• -9 × -220 = (-9, -220)
• -10 × -198 = (-10, -198)
• -11 × -180 = (-11, -180)
• -12 × -165 = (-12, -165)
• -15 × -132 = (-15, -132)
• -18 × -110 = (-18, -110)
• -20 × -99 = (-20, -99)
• -22 × -90 = (-22, -90)
• -30 × -66 = (-30, -66)
• -33 × -60 = (-33, -60)
• -36 × -55 = (-36, -55)
• -44 × -45 = (-44, -45)

NOTE: If (a, b) is a pair factor of a number then (b, a) is also a pair factor of that number.