257291265

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{331}}^1\times {\mathrm{673}}^1$

素因数の和:1030

約数の個数: 64

約数和(自身を含む): 515561472

約数和(自身を除く): 258270207

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 331, 385, 673, 993, 1155, 1655, 2019, 2317, 3365, 3641, 4711, 4965, 6951, 7403, 10095, 10923, 11585, 14133, 18205, 22209, 23555, 25487, 34755, 37015, 51821, 54615, 70665, 76461, 111045, 127435, 155463, 222763, 259105, 382305, 668289, 777315, 1113815, 1559341, 2450393, 3341445, 4678023, 7351179, 7796705, 12251965, 17152751, 23390115, 36755895, 51458253, 85763755, 257291265]

約数ペア:

[(1, 257291265), (3, 85763755), (5, 51458253), (7, 36755895), (11, 23390115), (15, 17152751), (21, 12251965), (33, 7796705), (35, 7351179), (55, 4678023), (77, 3341445), (105, 2450393), (165, 1559341), (231, 1113815), (331, 777315), (385, 668289), (673, 382305), (993, 259105), (1155, 222763), (1655, 155463), (2019, 127435), (2317, 111045), (3365, 76461), (3641, 70665), (4711, 54615), (4965, 51821), (6951, 37015), (7403, 34755), (10095, 25487), (10923, 23555), (11585, 22209), (14133, 18205)]