287172920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1\times {\mathrm{839}}^1$

素因数の和:1092

約数の個数: 64

約数和(自身を含む): 665280000

約数和(自身を除く): 378107080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 199, 215, 344, 398, 430, 796, 839, 860, 995, 1592, 1678, 1720, 1990, 3356, 3980, 4195, 6712, 7960, 8390, 8557, 16780, 17114, 33560, 34228, 36077, 42785, 68456, 72154, 85570, 144308, 166961, 171140, 180385, 288616, 333922, 342280, 360770, 667844, 721540, 834805, 1335688, 1443080, 1669610, 3339220, 6678440, 7179323, 14358646, 28717292, 35896615, 57434584, 71793230, 143586460, 287172920]

約数ペア:

[(1, 287172920), (2, 143586460), (4, 71793230), (5, 57434584), (8, 35896615), (10, 28717292), (20, 14358646), (40, 7179323), (43, 6678440), (86, 3339220), (172, 1669610), (199, 1443080), (215, 1335688), (344, 834805), (398, 721540), (430, 667844), (796, 360770), (839, 342280), (860, 333922), (995, 288616), (1592, 180385), (1678, 171140), (1720, 166961), (1990, 144308), (3356, 85570), (3980, 72154), (4195, 68456), (6712, 42785), (7960, 36077), (8390, 34228), (8557, 33560), (16780, 17114)]