20159979

素因数分解:

$3^1\times 7^1\times {\mathrm{643}}^1\times {\mathrm{1493}}^1$

素因数の和:2146

約数の個数: 16

約数和(自身を含む): 30788352

約数和(自身を除く): 10628373

約数列:

[1, 3, 7, 21, 643, 1493, 1929, 4479, 4501, 10451, 13503, 31353, 959999, 2879997, 6719993, 20159979]

約数ペア:

[(1, 20159979), (3, 6719993), (7, 2879997), (21, 959999), (643, 31353), (1493, 13503), (1929, 10451), (4479, 4501)]