20428475

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{677}}^1$

素因数の和:775

約数の個数: 24

約数和(自身を含む): 27239328

約数和(自身を除く): 6810853

約数列:

[1, 5, 17, 25, 71, 85, 355, 425, 677, 1207, 1775, 3385, 6035, 11509, 16925, 30175, 48067, 57545, 240335, 287725, 817139, 1201675, 4085695, 20428475]

約数ペア:

[(1, 20428475), (5, 4085695), (17, 1201675), (25, 817139), (71, 287725), (85, 240335), (355, 57545), (425, 48067), (677, 30175), (1207, 16925), (1775, 11509), (3385, 6035)]