21787191

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{193}}^1$

素因数の和:352

約数の個数: 32

約数和(自身を含む): 33616320

約数和(自身を除く): 11829129

約数列:

[1, 3, 9, 27, 37, 111, 113, 193, 333, 339, 579, 999, 1017, 1737, 3051, 4181, 5211, 7141, 12543, 21423, 21809, 37629, 64269, 65427, 112887, 192807, 196281, 588843, 806933, 2420799, 7262397, 21787191]

約数ペア:

[(1, 21787191), (3, 7262397), (9, 2420799), (27, 806933), (37, 588843), (111, 196281), (113, 192807), (193, 112887), (333, 65427), (339, 64269), (579, 37629), (999, 21809), (1017, 21423), (1737, 12543), (3051, 7141), (4181, 5211)]