Factors / Factors of 428

Factors of 428

1, 2, 4, 107, 214, 428

428 breaks into 3 pairs, tested up to √428 ≈ 20.7; each pair multiplies back to 428 exactly. 428's full pair list is (1, 428), (2, 214), (4, 107), for 6 divisors in total. 428's divisors other than 428 itself sum to just 328, 100 below 428: the common deficient case. 428 is even, digit sum 14 for 428; small divisors of 428 include 2, 4. 428 has 6 divisors; 427 has 4 and 429 has 8, so 429 wins here. 428 divided by its largest divisor, 214, gives 2.