21210981

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:373

約数の個数: 32

約数和(自身を含む): 32247936

約数和(自身を除く): 11036955

約数列:

[1, 3, 11, 33, 41, 61, 123, 183, 257, 451, 671, 771, 1353, 2013, 2501, 2827, 7503, 8481, 10537, 15677, 27511, 31611, 47031, 82533, 115907, 172447, 347721, 517341, 642757, 1928271, 7070327, 21210981]

約数ペア:

[(1, 21210981), (3, 7070327), (11, 1928271), (33, 642757), (41, 517341), (61, 347721), (123, 172447), (183, 115907), (257, 82533), (451, 47031), (671, 31611), (771, 27511), (1353, 15677), (2013, 10537), (2501, 8481), (2827, 7503)]