18708784

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{383}}^1$

素因数の和:505

約数の個数: 40

約数和(自身を含む): 37711872

約数和(自身を除く): 19003088

約数列:

[1, 2, 4, 8, 16, 43, 71, 86, 142, 172, 284, 344, 383, 568, 688, 766, 1136, 1532, 3053, 3064, 6106, 6128, 12212, 16469, 24424, 27193, 32938, 48848, 54386, 65876, 108772, 131752, 217544, 263504, 435088, 1169299, 2338598, 4677196, 9354392, 18708784]

約数ペア:

[(1, 18708784), (2, 9354392), (4, 4677196), (8, 2338598), (16, 1169299), (43, 435088), (71, 263504), (86, 217544), (142, 131752), (172, 108772), (284, 65876), (344, 54386), (383, 48848), (568, 32938), (688, 27193), (766, 24424), (1136, 16469), (1532, 12212), (3053, 6128), (3064, 6106)]