21029679

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:229

約数の個数: 48

約数和(自身を含む): 35303520

約数和(自身を除く): 14273841

約数列:

[1, 3, 9, 11, 27, 33, 41, 99, 121, 123, 157, 297, 363, 369, 451, 471, 1089, 1107, 1353, 1413, 1727, 3267, 4059, 4239, 4961, 5181, 6437, 12177, 14883, 15543, 18997, 19311, 44649, 46629, 56991, 57933, 70807, 133947, 170973, 173799, 212421, 512919, 637263, 778877, 1911789, 2336631, 7009893, 21029679]

約数ペア:

[(1, 21029679), (3, 7009893), (9, 2336631), (11, 1911789), (27, 778877), (33, 637263), (41, 512919), (99, 212421), (121, 173799), (123, 170973), (157, 133947), (297, 70807), (363, 57933), (369, 56991), (451, 46629), (471, 44649), (1089, 19311), (1107, 18997), (1353, 15543), (1413, 14883), (1727, 12177), (3267, 6437), (4059, 5181), (4239, 4961)]