18971519

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{2129}}^1$

素因数の和:2222

約数の個数: 16

約数和(自身を含む): 23174400

約数和(自身を除く): 4202881

約数列:

[1, 7, 19, 67, 133, 469, 1273, 2129, 8911, 14903, 40451, 142643, 283157, 998501, 2710217, 18971519]

約数ペア:

[(1, 18971519), (7, 2710217), (19, 998501), (67, 283157), (133, 142643), (469, 40451), (1273, 14903), (2129, 8911)]