21508509

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{11047}}^1$

素因数の和:11120

約数の個数: 16

約数和(自身を含む): 31818240

約数和(自身を除く): 10309731

約数列:

[1, 3, 11, 33, 59, 177, 649, 1947, 11047, 33141, 121517, 364551, 651773, 1955319, 7169503, 21508509]

約数ペア:

[(1, 21508509), (3, 7169503), (11, 1955319), (33, 651773), (59, 364551), (177, 121517), (649, 33141), (1947, 11047)]