21591739

素因数分解:

${\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1\times {\mathrm{157}}^1$

素因数の和:390

約数の個数: 16

約数和(自身を含む): 23889600

約数和(自身を除く): 2297861

約数列:

[1, 13, 71, 149, 157, 923, 1937, 2041, 10579, 11147, 23393, 137527, 144911, 304109, 1660903, 21591739]

約数ペア:

[(1, 21591739), (13, 1660903), (71, 304109), (149, 144911), (157, 137527), (923, 23393), (1937, 11147), (2041, 10579)]