280486520

素因数分解:

$2^3\times 5^1\times {\mathrm{167}}^1\times {\mathrm{199}}^1\times {\mathrm{211}}^1$

素因数の和:588

約数の個数: 64

約数和(自身を含む): 641088000

約数和(自身を除く): 360601480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 167, 199, 211, 334, 398, 422, 668, 796, 835, 844, 995, 1055, 1336, 1592, 1670, 1688, 1990, 2110, 3340, 3980, 4220, 6680, 7960, 8440, 33233, 35237, 41989, 66466, 70474, 83978, 132932, 140948, 166165, 167956, 176185, 209945, 265864, 281896, 332330, 335912, 352370, 419890, 664660, 704740, 839780, 1329320, 1409480, 1679560, 7012163, 14024326, 28048652, 35060815, 56097304, 70121630, 140243260, 280486520]

約数ペア:

[(1, 280486520), (2, 140243260), (4, 70121630), (5, 56097304), (8, 35060815), (10, 28048652), (20, 14024326), (40, 7012163), (167, 1679560), (199, 1409480), (211, 1329320), (334, 839780), (398, 704740), (422, 664660), (668, 419890), (796, 352370), (835, 335912), (844, 332330), (995, 281896), (1055, 265864), (1336, 209945), (1592, 176185), (1670, 167956), (1688, 166165), (1990, 140948), (2110, 132932), (3340, 83978), (3980, 70474), (4220, 66466), (6680, 41989), (7960, 35237), (8440, 33233)]