128940

素因数分解:

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

素因数の和:326

約数の個数: 48

約数和(自身を含む): 413952

約数和(自身を除く): 285012

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, 307, 420, 614, 921, 1228, 1535, 1842, 2149, 3070, 3684, 4298, 4605, 6140, 6447, 8596, 9210, 10745, 12894, 18420, 21490, 25788, 32235, 42980, 64470, 128940]

約数ペア:

[(1, 128940), (2, 64470), (3, 42980), (4, 32235), (5, 25788), (6, 21490), (7, 18420), (10, 12894), (12, 10745), (14, 9210), (15, 8596), (20, 6447), (21, 6140), (28, 4605), (30, 4298), (35, 3684), (42, 3070), (60, 2149), (70, 1842), (84, 1535), (105, 1228), (140, 921), (210, 614), (307, 420)]