20194520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{199}}^1$

素因数の和:312

約数の個数: 64

約数和(自身を含む): 47520000

約数和(自身を除く): 27325480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 59, 86, 118, 172, 199, 215, 236, 295, 344, 398, 430, 472, 590, 796, 860, 995, 1180, 1592, 1720, 1990, 2360, 2537, 3980, 5074, 7960, 8557, 10148, 11741, 12685, 17114, 20296, 23482, 25370, 34228, 42785, 46964, 50740, 58705, 68456, 85570, 93928, 101480, 117410, 171140, 234820, 342280, 469640, 504863, 1009726, 2019452, 2524315, 4038904, 5048630, 10097260, 20194520]

約数ペア:

[(1, 20194520), (2, 10097260), (4, 5048630), (5, 4038904), (8, 2524315), (10, 2019452), (20, 1009726), (40, 504863), (43, 469640), (59, 342280), (86, 234820), (118, 171140), (172, 117410), (199, 101480), (215, 93928), (236, 85570), (295, 68456), (344, 58705), (398, 50740), (430, 46964), (472, 42785), (590, 34228), (796, 25370), (860, 23482), (995, 20296), (1180, 17114), (1592, 12685), (1720, 11741), (1990, 10148), (2360, 8557), (2537, 7960), (3980, 5074)]