257000

素因数分解:

$2^3\times 5^3\times {\mathrm{257}}^1$

素因数の和:278

約数の個数: 32

約数和(自身を含む): 603720

約数和(自身を除く): 346720

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 257, 500, 514, 1000, 1028, 1285, 2056, 2570, 5140, 6425, 10280, 12850, 25700, 32125, 51400, 64250, 128500, 257000]

約数ペア:

[(1, 257000), (2, 128500), (4, 64250), (5, 51400), (8, 32125), (10, 25700), (20, 12850), (25, 10280), (40, 6425), (50, 5140), (100, 2570), (125, 2056), (200, 1285), (250, 1028), (257, 1000), (500, 514)]