20123971

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1\times {\mathrm{643}}^1$

素因数の和:930

約数の個数: 16

約数和(自身を含む): 24482304

約数和(自身を除く): 4358333

約数列:

[1, 7, 17, 119, 263, 643, 1841, 4471, 4501, 10931, 31297, 76517, 169109, 1183763, 2874853, 20123971]

約数ペア:

[(1, 20123971), (7, 2874853), (17, 1183763), (119, 169109), (263, 76517), (643, 31297), (1841, 10931), (4471, 4501)]