21909717

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{42709}}^1$

素因数の和:42737

約数の個数: 16

約数和(自身を含む): 34168000

約数和(自身を除く): 12258283

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 42709, 128127, 384381, 811471, 1153143, 2434413, 7303239, 21909717]

約数ペア:

[(1, 21909717), (3, 7303239), (9, 2434413), (19, 1153143), (27, 811471), (57, 384381), (171, 128127), (513, 42709)]