Factors / Factors of 440

Factors of 440

1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440

440 breaks into 8 pairs, tested up to √440 ≈ 21.0; each pair multiplies back to 440 exactly. 440's full pair list is (1, 440), (2, 220), (4, 110), (5, 88), (8, 55), (10, 44), (11, 40), (20, 22), for 16 divisors in total. 440's divisors other than 440 itself sum to 640, 200 above 440: abundant. 440 is even, digit sum 8 for 440; small divisors of 440 include 2, 4, 5, 8, 10. 440 has 16 divisors; 439 has 2 and 441 has 9, so 440 wins here. 440 divided by its largest divisor, 220, gives 2.