21445479

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 14407065

約数列:

[1, 3, 9, 11, 27, 33, 71, 81, 99, 113, 213, 243, 297, 339, 639, 781, 891, 1017, 1243, 1917, 2343, 2673, 3051, 3729, 5751, 7029, 8023, 9153, 11187, 17253, 21087, 24069, 27459, 33561, 63261, 72207, 88253, 100683, 189783, 216621, 264759, 302049, 649863, 794277, 1949589, 2382831, 7148493, 21445479]

約数ペア:

[(1, 21445479), (3, 7148493), (9, 2382831), (11, 1949589), (27, 794277), (33, 649863), (71, 302049), (81, 264759), (99, 216621), (113, 189783), (213, 100683), (243, 88253), (297, 72207), (339, 63261), (639, 33561), (781, 27459), (891, 24069), (1017, 21087), (1243, 17253), (1917, 11187), (2343, 9153), (2673, 8023), (3051, 7029), (3729, 5751)]