19990700

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{4649}}^1$

素因数の和:4706

約数の個数: 36

約数和(自身を含む): 44398200

約数和(自身を除く): 24407500

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 172, 215, 430, 860, 1075, 2150, 4300, 4649, 9298, 18596, 23245, 46490, 92980, 116225, 199907, 232450, 399814, 464900, 799628, 999535, 1999070, 3998140, 4997675, 9995350, 19990700]

約数ペア:

[(1, 19990700), (2, 9995350), (4, 4997675), (5, 3998140), (10, 1999070), (20, 999535), (25, 799628), (43, 464900), (50, 399814), (86, 232450), (100, 199907), (172, 116225), (215, 92980), (430, 46490), (860, 23245), (1075, 18596), (2150, 9298), (4300, 4649)]