21277739

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{1019}}^1$

素因数の和:1202

約数の個数: 16

約数和(自身を含む): 25785600

約数和(自身を除く): 4507861

約数列:

[1, 7, 19, 133, 157, 1019, 1099, 2983, 7133, 19361, 20881, 135527, 159983, 1119881, 3039677, 21277739]

約数ペア:

[(1, 21277739), (7, 3039677), (19, 1119881), (133, 159983), (157, 135527), (1019, 20881), (1099, 19361), (2983, 7133)]