21728707

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{443}}^1$

素因数の和:488

約数の個数: 32

約数和(自身を含む): 29836800

約数和(自身を除く): 8108093

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 343, 443, 539, 637, 1001, 3101, 3773, 4459, 4873, 5759, 7007, 21707, 34111, 40313, 49049, 63349, 151949, 238777, 282191, 443443, 1671439, 1975337, 3104101, 21728707]

約数ペア:

[(1, 21728707), (7, 3104101), (11, 1975337), (13, 1671439), (49, 443443), (77, 282191), (91, 238777), (143, 151949), (343, 63349), (443, 49049), (539, 40313), (637, 34111), (1001, 21707), (3101, 7007), (3773, 5759), (4459, 4873)]