21887091

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:225

約数の個数: 40

約数和(自身を含む): 34393040

約数和(自身を除く): 12505949

約数列:

[1, 3, 9, 27, 37, 67, 81, 109, 111, 201, 327, 333, 603, 981, 999, 1809, 2479, 2943, 2997, 4033, 5427, 7303, 7437, 8829, 12099, 21909, 22311, 36297, 65727, 66933, 108891, 197181, 200799, 270211, 326673, 591543, 810633, 2431899, 7295697, 21887091]

約数ペア:

[(1, 21887091), (3, 7295697), (9, 2431899), (27, 810633), (37, 591543), (67, 326673), (81, 270211), (109, 200799), (111, 197181), (201, 108891), (327, 66933), (333, 65727), (603, 36297), (981, 22311), (999, 21909), (1809, 12099), (2479, 8829), (2943, 7437), (2997, 7303), (4033, 5427)]