20669875

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:240

約数の個数: 32

約数和(自身を含む): 27900288

約数和(自身を除く): 7230413

約数列:

[1, 5, 17, 25, 71, 85, 125, 137, 355, 425, 685, 1207, 1775, 2125, 2329, 3425, 6035, 8875, 9727, 11645, 17125, 30175, 48635, 58225, 150875, 165359, 243175, 291125, 826795, 1215875, 4133975, 20669875]

約数ペア:

[(1, 20669875), (5, 4133975), (17, 1215875), (25, 826795), (71, 291125), (85, 243175), (125, 165359), (137, 150875), (355, 58225), (425, 48635), (685, 30175), (1207, 17125), (1775, 11645), (2125, 9727), (2329, 8875), (3425, 6035)]