21554687

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{1783}}^1$

素因数の和:1958

約数の個数: 16

約数和(自身を含む): 27059712

約数和(自身を除く): 5505025

約数列:

[1, 7, 11, 77, 157, 1099, 1727, 1783, 12089, 12481, 19613, 137291, 279931, 1959517, 3079241, 21554687]

約数ペア:

[(1, 21554687), (7, 3079241), (11, 1959517), (77, 279931), (157, 137291), (1099, 19613), (1727, 12481), (1783, 12089)]