21225281

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{743}}^1$

素因数の和:821

約数の個数: 24

約数和(自身を含む): 27480384

約数和(自身を除く): 6255103

約数列:

[1, 7, 11, 49, 53, 77, 371, 539, 583, 743, 2597, 4081, 5201, 8173, 28567, 36407, 39379, 57211, 275653, 400477, 433169, 1929571, 3032183, 21225281]

約数ペア:

[(1, 21225281), (7, 3032183), (11, 1929571), (49, 433169), (53, 400477), (77, 275653), (371, 57211), (539, 39379), (583, 36407), (743, 28567), (2597, 8173), (4081, 5201)]