20986756

素因数分解:

$2^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{5471}}^1$

素因数の和:5619

約数の個数: 24

約数和(自身を含む): 42287616

約数和(自身を除く): 21300860

約数列:

[1, 2, 4, 7, 14, 28, 137, 274, 548, 959, 1918, 3836, 5471, 10942, 21884, 38297, 76594, 153188, 749527, 1499054, 2998108, 5246689, 10493378, 20986756]

約数ペア:

[(1, 20986756), (2, 10493378), (4, 5246689), (7, 2998108), (14, 1499054), (28, 749527), (137, 153188), (274, 76594), (548, 38297), (959, 21884), (1918, 10942), (3836, 5471)]