666820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{433}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 1749888

約数和(自身を除く): 1083068

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 433, 770, 866, 1540, 1732, 2165, 3031, 4330, 4763, 6062, 8660, 9526, 12124, 15155, 19052, 23815, 30310, 33341, 47630, 60620, 66682, 95260, 133364, 166705, 333410, 666820]

約数ペア:

[(1, 666820), (2, 333410), (4, 166705), (5, 133364), (7, 95260), (10, 66682), (11, 60620), (14, 47630), (20, 33341), (22, 30310), (28, 23815), (35, 19052), (44, 15155), (55, 12124), (70, 9526), (77, 8660), (110, 6062), (140, 4763), (154, 4330), (220, 3031), (308, 2165), (385, 1732), (433, 1540), (770, 866)]