21354800

素因数分解:

$2^4\times 5^2\times {\mathrm{197}}^1\times {\mathrm{271}}^1$

素因数の和:486

約数の個数: 60

約数和(自身を含む): 51755616

約数和(自身を除く): 30400816

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 197, 200, 271, 394, 400, 542, 788, 985, 1084, 1355, 1576, 1970, 2168, 2710, 3152, 3940, 4336, 4925, 5420, 6775, 7880, 9850, 10840, 13550, 15760, 19700, 21680, 27100, 39400, 53387, 54200, 78800, 106774, 108400, 213548, 266935, 427096, 533870, 854192, 1067740, 1334675, 2135480, 2669350, 4270960, 5338700, 10677400, 21354800]

約数ペア:

[(1, 21354800), (2, 10677400), (4, 5338700), (5, 4270960), (8, 2669350), (10, 2135480), (16, 1334675), (20, 1067740), (25, 854192), (40, 533870), (50, 427096), (80, 266935), (100, 213548), (197, 108400), (200, 106774), (271, 78800), (394, 54200), (400, 53387), (542, 39400), (788, 27100), (985, 21680), (1084, 19700), (1355, 15760), (1576, 13550), (1970, 10840), (2168, 9850), (2710, 7880), (3152, 6775), (3940, 5420), (4336, 4925)]