21539331

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{347}}^1$

素因数の和:397

約数の個数: 48

約数和(自身を含む): 37027200

約数和(自身を除く): 15487869

約数列:

[1, 3, 9, 11, 19, 27, 33, 57, 99, 121, 171, 209, 297, 347, 363, 513, 627, 1041, 1089, 1881, 2299, 3123, 3267, 3817, 5643, 6593, 6897, 9369, 11451, 19779, 20691, 34353, 41987, 59337, 62073, 72523, 103059, 125961, 178011, 217569, 377883, 652707, 797753, 1133649, 1958121, 2393259, 7179777, 21539331]

約数ペア:

[(1, 21539331), (3, 7179777), (9, 2393259), (11, 1958121), (19, 1133649), (27, 797753), (33, 652707), (57, 377883), (99, 217569), (121, 178011), (171, 125961), (209, 103059), (297, 72523), (347, 62073), (363, 59337), (513, 41987), (627, 34353), (1041, 20691), (1089, 19779), (1881, 11451), (2299, 9369), (3123, 6897), (3267, 6593), (3817, 5643)]