855700

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{199}}^1$

素因数の和:256

約数の個数: 36

約数和(自身を含む): 1909600

約数和(自身を除く): 1053900

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 172, 199, 215, 398, 430, 796, 860, 995, 1075, 1990, 2150, 3980, 4300, 4975, 8557, 9950, 17114, 19900, 34228, 42785, 85570, 171140, 213925, 427850, 855700]

約数ペア:

[(1, 855700), (2, 427850), (4, 213925), (5, 171140), (10, 85570), (20, 42785), (25, 34228), (43, 19900), (50, 17114), (86, 9950), (100, 8557), (172, 4975), (199, 4300), (215, 3980), (398, 2150), (430, 1990), (796, 1075), (860, 995)]