81428800

素因数分解:

$2^6\times 5^2\times {\mathrm{50893}}^1$

素因数の和:50915

約数の個数: 42

約数和(自身を含む): 200369678

約数和(自身を除く): 118940878

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 50893, 101786, 203572, 254465, 407144, 508930, 814288, 1017860, 1272325, 1628576, 2035720, 2544650, 3257152, 4071440, 5089300, 8142880, 10178600, 16285760, 20357200, 40714400, 81428800]

約数ペア:

[(1, 81428800), (2, 40714400), (4, 20357200), (5, 16285760), (8, 10178600), (10, 8142880), (16, 5089300), (20, 4071440), (25, 3257152), (32, 2544650), (40, 2035720), (50, 1628576), (64, 1272325), (80, 1017860), (100, 814288), (160, 508930), (200, 407144), (320, 254465), (400, 203572), (800, 101786), (1600, 50893)]