257271285

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{709}}^1\times {\mathrm{1423}}^1$

素因数の和:2157

約数の個数: 32

約数和(自身を含む): 436769280

約数和(自身を除く): 179497995

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 709, 1423, 2127, 3545, 4269, 7115, 10635, 12053, 21345, 24191, 36159, 60265, 72573, 120955, 180795, 362865, 1008907, 3026721, 5044535, 15133605, 17151419, 51454257, 85757095, 257271285]

約数ペア:

[(1, 257271285), (3, 85757095), (5, 51454257), (15, 17151419), (17, 15133605), (51, 5044535), (85, 3026721), (255, 1008907), (709, 362865), (1423, 180795), (2127, 120955), (3545, 72573), (4269, 60265), (7115, 36159), (10635, 24191), (12053, 21345)]