Factors / Factors of 290

Factors of 290

1, 2, 5, 10, 29, 58, 145, 290

290 breaks into 4 pairs, tested up to √290 ≈ 17.0; each pair multiplies back to 290 exactly. 290's full pair list is (1, 290), (2, 145), (5, 58), (10, 29), for 8 divisors in total. 290's divisors other than 290 itself sum to just 250, 40 below 290: the common deficient case. 290 is even, digit sum 11 for 290; small divisors of 290 include 2, 5, 10. 290 has 8 divisors; 289 has 3 and 291 has 4, so 290 wins here. 290 divided by its largest divisor, 145, gives 2.