21297573

素因数分解:

$3^4\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:128

約数の個数: 60

約数和(自身を含む): 36498924

約数和(自身を除く): 15201351

約数列:

[1, 3, 9, 11, 27, 33, 41, 53, 81, 99, 121, 123, 159, 297, 363, 369, 451, 477, 583, 891, 1089, 1107, 1353, 1431, 1749, 2173, 3267, 3321, 4059, 4293, 4961, 5247, 6413, 6519, 9801, 12177, 14883, 15741, 19239, 19557, 23903, 36531, 44649, 47223, 57717, 58671, 71709, 133947, 173151, 176013, 215127, 262933, 401841, 519453, 645381, 788799, 1936143, 2366397, 7099191, 21297573]

約数ペア:

[(1, 21297573), (3, 7099191), (9, 2366397), (11, 1936143), (27, 788799), (33, 645381), (41, 519453), (53, 401841), (81, 262933), (99, 215127), (121, 176013), (123, 173151), (159, 133947), (297, 71709), (363, 58671), (369, 57717), (451, 47223), (477, 44649), (583, 36531), (891, 23903), (1089, 19557), (1107, 19239), (1353, 15741), (1431, 14883), (1749, 12177), (2173, 9801), (3267, 6519), (3321, 6413), (4059, 5247), (4293, 4961)]