1680140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{1091}}^1$

素因数の和:1118

約数の個数: 48

約数和(自身を含む): 4402944

約数和(自身を除く): 2722804

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, 770, 1091, 1540, 2182, 4364, 5455, 7637, 10910, 12001, 15274, 21820, 24002, 30548, 38185, 48004, 60005, 76370, 84007, 120010, 152740, 168014, 240020, 336028, 420035, 840070, 1680140]

約数ペア:

[(1, 1680140), (2, 840070), (4, 420035), (5, 336028), (7, 240020), (10, 168014), (11, 152740), (14, 120010), (20, 84007), (22, 76370), (28, 60005), (35, 48004), (44, 38185), (55, 30548), (70, 24002), (77, 21820), (110, 15274), (140, 12001), (154, 10910), (220, 7637), (308, 5455), (385, 4364), (770, 2182), (1091, 1540)]