21781143

素因数分解:

$3^4\times {\mathrm{109}}^1\times {\mathrm{2467}}^1$

素因数の和:2588

約数の個数: 20

約数和(自身を含む): 32849080

約数和(自身を除く): 11067937

約数列:

[1, 3, 9, 27, 81, 109, 327, 981, 2467, 2943, 7401, 8829, 22203, 66609, 199827, 268903, 806709, 2420127, 7260381, 21781143]

約数ペア:

[(1, 21781143), (3, 7260381), (9, 2420127), (27, 806709), (81, 268903), (109, 199827), (327, 66609), (981, 22203), (2467, 8829), (2943, 7401)]