81532780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{12391}}^1$

素因数の和:12454

約数の個数: 48

約数和(自身を含む): 199858176

約数和(自身を除く): 118325396

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 47, 70, 94, 140, 188, 235, 329, 470, 658, 940, 1316, 1645, 3290, 6580, 12391, 24782, 49564, 61955, 86737, 123910, 173474, 247820, 346948, 433685, 582377, 867370, 1164754, 1734740, 2329508, 2911885, 4076639, 5823770, 8153278, 11647540, 16306556, 20383195, 40766390, 81532780]

約数ペア:

[(1, 81532780), (2, 40766390), (4, 20383195), (5, 16306556), (7, 11647540), (10, 8153278), (14, 5823770), (20, 4076639), (28, 2911885), (35, 2329508), (47, 1734740), (70, 1164754), (94, 867370), (140, 582377), (188, 433685), (235, 346948), (329, 247820), (470, 173474), (658, 123910), (940, 86737), (1316, 61955), (1645, 49564), (3290, 24782), (6580, 12391)]