257148780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{612259}}^1$

素因数の和:612278

約数の個数: 48

約数和(自身を含む): 822877440

約数和(自身を除く): 565728660

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 612259, 1224518, 1836777, 2449036, 3061295, 3673554, 4285813, 6122590, 7347108, 8571626, 9183885, 12245180, 12857439, 17143252, 18367770, 21429065, 25714878, 36735540, 42858130, 51429756, 64287195, 85716260, 128574390, 257148780]

約数ペア:

[(1, 257148780), (2, 128574390), (3, 85716260), (4, 64287195), (5, 51429756), (6, 42858130), (7, 36735540), (10, 25714878), (12, 21429065), (14, 18367770), (15, 17143252), (20, 12857439), (21, 12245180), (28, 9183885), (30, 8571626), (35, 7347108), (42, 6122590), (60, 4285813), (70, 3673554), (84, 3061295), (105, 2449036), (140, 1836777), (210, 1224518), (420, 612259)]