18723920

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5443}}^1$

素因数の和:5499

約数の個数: 40

約数和(自身を含む): 44553696

約数和(自身を除く): 25829776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5443, 10886, 21772, 27215, 43544, 54430, 87088, 108860, 217720, 234049, 435440, 468098, 936196, 1170245, 1872392, 2340490, 3744784, 4680980, 9361960, 18723920]

約数ペア:

[(1, 18723920), (2, 9361960), (4, 4680980), (5, 3744784), (8, 2340490), (10, 1872392), (16, 1170245), (20, 936196), (40, 468098), (43, 435440), (80, 234049), (86, 217720), (172, 108860), (215, 87088), (344, 54430), (430, 43544), (688, 27215), (860, 21772), (1720, 10886), (3440, 5443)]