21951567

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{347}}^1$

素因数の和:441

約数の個数: 40

約数和(自身を含む): 36381312

約数和(自身を除く): 14429745

約数列:

[1, 3, 9, 11, 27, 33, 71, 81, 99, 213, 297, 347, 639, 781, 891, 1041, 1917, 2343, 3123, 3817, 5751, 7029, 9369, 11451, 21087, 24637, 28107, 34353, 63261, 73911, 103059, 221733, 271007, 309177, 665199, 813021, 1995597, 2439063, 7317189, 21951567]

約数ペア:

[(1, 21951567), (3, 7317189), (9, 2439063), (11, 1995597), (27, 813021), (33, 665199), (71, 309177), (81, 271007), (99, 221733), (213, 103059), (297, 73911), (347, 63261), (639, 34353), (781, 28107), (891, 24637), (1041, 21087), (1917, 11451), (2343, 9369), (3123, 7029), (3817, 5751)]