80400400

素因数分解:

$2^4\times 5^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:257

約数の個数: 120

約数和(自身を含む): 207576000

約数和(自身を除く): 127175600

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 38, 40, 50, 71, 76, 80, 95, 100, 142, 149, 152, 190, 200, 284, 298, 304, 355, 380, 400, 475, 568, 596, 710, 745, 760, 950, 1136, 1192, 1349, 1420, 1490, 1520, 1775, 1900, 2384, 2698, 2831, 2840, 2980, 3550, 3725, 3800, 5396, 5662, 5680, 5960, 6745, 7100, 7450, 7600, 10579, 10792, 11324, 11920, 13490, 14155, 14200, 14900, 21158, 21584, 22648, 26980, 28310, 28400, 29800, 33725, 42316, 45296, 52895, 53960, 56620, 59600, 67450, 70775, 84632, 105790, 107920, 113240, 134900, 141550, 169264, 201001, 211580, 226480, 264475, 269800, 283100, 402002, 423160, 528950, 539600, 566200, 804004, 846320, 1005005, 1057900, 1132400, 1608008, 2010010, 2115800, 3216016, 4020020, 4231600, 5025025, 8040040, 10050050, 16080080, 20100100, 40200200, 80400400]

約数ペア:

[(1, 80400400), (2, 40200200), (4, 20100100), (5, 16080080), (8, 10050050), (10, 8040040), (16, 5025025), (19, 4231600), (20, 4020020), (25, 3216016), (38, 2115800), (40, 2010010), (50, 1608008), (71, 1132400), (76, 1057900), (80, 1005005), (95, 846320), (100, 804004), (142, 566200), (149, 539600), (152, 528950), (190, 423160), (200, 402002), (284, 283100), (298, 269800), (304, 264475), (355, 226480), (380, 211580), (400, 201001), (475, 169264), (568, 141550), (596, 134900), (710, 113240), (745, 107920), (760, 105790), (950, 84632), (1136, 70775), (1192, 67450), (1349, 59600), (1420, 56620), (1490, 53960), (1520, 52895), (1775, 45296), (1900, 42316), (2384, 33725), (2698, 29800), (2831, 28400), (2840, 28310), (2980, 26980), (3550, 22648), (3725, 21584), (3800, 21158), (5396, 14900), (5662, 14200), (5680, 14155), (5960, 13490), (6745, 11920), (7100, 11324), (7450, 10792), (7600, 10579)]