20916147

素因数分解:

$3^1\times 7^1\times {\mathrm{643}}^1\times {\mathrm{1549}}^1$

素因数の和:2202

約数の個数: 16

約数和(自身を含む): 31942400

約数和(自身を除く): 11026253

約数列:

[1, 3, 7, 21, 643, 1549, 1929, 4501, 4647, 10843, 13503, 32529, 996007, 2988021, 6972049, 20916147]

約数ペア:

[(1, 20916147), (3, 6972049), (7, 2988021), (21, 996007), (643, 32529), (1549, 13503), (1929, 10843), (4501, 4647)]