21185680

素因数分解:

$2^4\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1933}}^1$

素因数の和:2083

約数の個数: 40

約数和(自身を含む): 49641912

約数和(自身を除く): 28456232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 137, 274, 548, 685, 1096, 1370, 1933, 2192, 2740, 3866, 5480, 7732, 9665, 10960, 15464, 19330, 30928, 38660, 77320, 154640, 264821, 529642, 1059284, 1324105, 2118568, 2648210, 4237136, 5296420, 10592840, 21185680]

約数ペア:

[(1, 21185680), (2, 10592840), (4, 5296420), (5, 4237136), (8, 2648210), (10, 2118568), (16, 1324105), (20, 1059284), (40, 529642), (80, 264821), (137, 154640), (274, 77320), (548, 38660), (685, 30928), (1096, 19330), (1370, 15464), (1933, 10960), (2192, 9665), (2740, 7732), (3866, 5480)]