19204660

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{163}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 41823936

約数和(自身を除く): 22619276

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 137, 163, 172, 215, 274, 326, 430, 548, 652, 685, 815, 860, 1370, 1630, 2740, 3260, 5891, 7009, 11782, 14018, 22331, 23564, 28036, 29455, 35045, 44662, 58910, 70090, 89324, 111655, 117820, 140180, 223310, 446620, 960233, 1920466, 3840932, 4801165, 9602330, 19204660]

約数ペア:

[(1, 19204660), (2, 9602330), (4, 4801165), (5, 3840932), (10, 1920466), (20, 960233), (43, 446620), (86, 223310), (137, 140180), (163, 117820), (172, 111655), (215, 89324), (274, 70090), (326, 58910), (430, 44662), (548, 35045), (652, 29455), (685, 28036), (815, 23564), (860, 22331), (1370, 14018), (1630, 11782), (2740, 7009), (3260, 5891)]