21506841

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{727}}^1$

素因数の和:925

約数の個数: 24

約数和(自身を含む): 32934720

約数和(自身を除く): 11427879

約数列:

[1, 3, 9, 19, 57, 171, 173, 519, 727, 1557, 2181, 3287, 6543, 9861, 13813, 29583, 41439, 124317, 125771, 377313, 1131939, 2389649, 7168947, 21506841]

約数ペア:

[(1, 21506841), (3, 7168947), (9, 2389649), (19, 1131939), (57, 377313), (171, 125771), (173, 124317), (519, 41439), (727, 29583), (1557, 13813), (2181, 9861), (3287, 6543)]