21749871

素因数分解:

$3^1\times {\mathrm{11}}^3\times {\mathrm{13}}^1\times {\mathrm{419}}^1$

素因数の和:468

約数の個数: 32

約数和(自身を含む): 34433280

約数和(自身を除く): 12683409

約数列:

[1, 3, 11, 13, 33, 39, 121, 143, 363, 419, 429, 1257, 1331, 1573, 3993, 4609, 4719, 5447, 13827, 16341, 17303, 50699, 51909, 59917, 152097, 179751, 557689, 659087, 1673067, 1977261, 7249957, 21749871]

約数ペア:

[(1, 21749871), (3, 7249957), (11, 1977261), (13, 1673067), (33, 659087), (39, 557689), (121, 179751), (143, 152097), (363, 59917), (419, 51909), (429, 50699), (1257, 17303), (1331, 16341), (1573, 13827), (3993, 5447), (4609, 4719)]