Factors / Factors of 407

Factors of 407

1, 11, 37, 407

407 breaks into 2 pairs, tested up to √407 ≈ 20.2; each pair multiplies back to 407 exactly. 407's full pair list is (1, 407), (11, 37), for 4 divisors in total. 407's divisors other than 407 itself sum to just 49, 358 below 407: the common deficient case. 407 is odd, digit sum 11 for 407; small divisors of 407 include 11. 407 has 4 divisors; 406 has 8 and 408 has 16, so 408 wins here. 407 divided by its largest divisor, 37, gives 11.