21043809

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{281}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 31278312

約数和(自身を除く): 10234503

約数列:

[1, 3, 9, 53, 157, 159, 281, 471, 477, 843, 1413, 2529, 8321, 14893, 24963, 44117, 44679, 74889, 132351, 134037, 397053, 2338201, 7014603, 21043809]

約数ペア:

[(1, 21043809), (3, 7014603), (9, 2338201), (53, 397053), (157, 134037), (159, 132351), (281, 74889), (471, 44679), (477, 44117), (843, 24963), (1413, 14893), (2529, 8321)]