21139676

素因数分解:

$2^2\times {\mathrm{139}}^1\times {\mathrm{193}}^1\times {\mathrm{197}}^1$

素因数の和:533

約数の個数: 24

約数和(自身を含む): 37643760

約数和(自身を除く): 16504084

約数列:

[1, 2, 4, 139, 193, 197, 278, 386, 394, 556, 772, 788, 26827, 27383, 38021, 53654, 54766, 76042, 107308, 109532, 152084, 5284919, 10569838, 21139676]

約数ペア:

[(1, 21139676), (2, 10569838), (4, 5284919), (139, 152084), (193, 109532), (197, 107308), (278, 76042), (386, 54766), (394, 53654), (556, 38021), (772, 27383), (788, 26827)]