21771531

素因数分解:

$3^3\times {\mathrm{59}}^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:320

約数の個数: 32

約数和(自身を含む): 33408000

約数和(自身を除く): 11636469

約数列:

[1, 3, 9, 27, 59, 79, 173, 177, 237, 519, 531, 711, 1557, 1593, 2133, 4661, 4671, 10207, 13667, 13983, 30621, 41001, 41949, 91863, 123003, 125847, 275589, 369009, 806353, 2419059, 7257177, 21771531]

約数ペア:

[(1, 21771531), (3, 7257177), (9, 2419059), (27, 806353), (59, 369009), (79, 275589), (173, 125847), (177, 123003), (237, 91863), (519, 41949), (531, 41001), (711, 30621), (1557, 13983), (1593, 13667), (2133, 10207), (4661, 4671)]