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Factors of 441

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What are the Factors of 441?

Answer

Factors of 441:

1, 3, 7, 9, 21, 49, 63, 147, 441

9 factors · 441 = 3² × 7² · composite

Underlined — prime: 3, 7 · 1 — neither prime nor composite · others — composite

Factor pairs of 441

5 pairs: 1 × 441 · 3 × 147 · 7 × 63 · 9 × 49 · 21 × 21

21 × 21 is a pair of one factor — that is why 441 has an odd number of factors, 9.

441 = 3² × 7² → (2 + 1) × (2 + 1) = 9 factors: add 1 to each exponent and multiply.

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See Also

Prime Number Checker - Find out whether a given number is Prime or not
Prime Factorization - Prime Factorization Calculator
Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between

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Factors of 441. Factors of 441: full list and factor pairs.

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Factors Table

Number	Factors
426	1, 2, 3, 6, 71, 142, 213, 426
427	1, 7, 61, 427
428	1, 2, 4, 107, 214, 428
429	1, 3, 11, 13, 33, 39, 143, 429
430	1, 2, 5, 10, 43, 86, 215, 430
431	1, 431
432	1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 108, 144, 216, 432
433	1, 433
434	1, 2, 7, 14, 31, 62, 217, 434
435	1, 3, 5, 15, 29, 87, 145, 435
436	1, 2, 4, 109, 218, 436
437	1, 19, 23, 437
438	1, 2, 3, 6, 73, 146, 219, 438
439	1, 439
440	1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440
441	1, 3, 7, 9, 21, 49, 63, 147, 441
442	1, 2, 13, 17, 26, 34, 221, 442
443	1, 443
444	1, 2, 3, 4, 6, 12, 37, 74, 111, 148, 222, 444
445	1, 5, 89, 445
446	1, 2, 223, 446
447	1, 3, 149, 447
448	1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 224, 448
449	1, 449
450	1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 30, 45, 50, 75, 90, 150, 225, 450
451	1, 11, 41, 451
452	1, 2, 4, 113, 226, 452
453	1, 3, 151, 453
454	1, 2, 227, 454
455	1, 5, 7, 13, 35, 65, 91, 455

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FAQ

What are the Factors of 441?

Factors of 441: 1, 3, 7, 9, 21, 49, 63, 147, 441

How many factors does 441 have?

Number 441 has 9 factors

How many Factor Pairs does 441 have?

Number 441 has 5 factor pairs

Is 441 a prime or composite number?

Composite: 441 = 3² × 7², so it has 9 factors — a prime has exactly two.

How many factors does 441 have excluding 1 and 441?

7: 3, 7, 9, 21, 49, 63 and 147.

Why does 441 have an odd number of factors?

441 is a perfect square: in the pair 21 × 21 the factor 21 pairs with itself, so the 9 factors are 4 pairs plus 21.