21753927

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{283}}^1$

素因数の和:381

約数の個数: 40

約数和(自身を含む): 35601104

約数和(自身を除く): 13847177

約数列:

[1, 3, 9, 13, 27, 39, 73, 81, 117, 219, 283, 351, 657, 849, 949, 1053, 1971, 2547, 2847, 3679, 5913, 7641, 8541, 11037, 20659, 22923, 25623, 33111, 61977, 76869, 99333, 185931, 268567, 297999, 557793, 805701, 1673379, 2417103, 7251309, 21753927]

約数ペア:

[(1, 21753927), (3, 7251309), (9, 2417103), (13, 1673379), (27, 805701), (39, 557793), (73, 297999), (81, 268567), (117, 185931), (219, 99333), (283, 76869), (351, 61977), (657, 33111), (849, 25623), (949, 22923), (1053, 20659), (1971, 11037), (2547, 8541), (2847, 7641), (3679, 5913)]