257880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{307}}^1$

素因数の和:328

約数の個数: 64

約数和(自身を含む): 887040

約数和(自身を除く): 629160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 307, 420, 614, 840, 921, 1228, 1535, 1842, 2149, 2456, 3070, 3684, 4298, 4605, 6140, 6447, 7368, 8596, 9210, 10745, 12280, 12894, 17192, 18420, 21490, 25788, 32235, 36840, 42980, 51576, 64470, 85960, 128940, 257880]

約数ペア:

[(1, 257880), (2, 128940), (3, 85960), (4, 64470), (5, 51576), (6, 42980), (7, 36840), (8, 32235), (10, 25788), (12, 21490), (14, 18420), (15, 17192), (20, 12894), (21, 12280), (24, 10745), (28, 9210), (30, 8596), (35, 7368), (40, 6447), (42, 6140), (56, 4605), (60, 4298), (70, 3684), (84, 3070), (105, 2456), (120, 2149), (140, 1842), (168, 1535), (210, 1228), (280, 921), (307, 840), (420, 614)]