128640640

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:258

約数の個数: 128

約数和(自身を含む): 330480000

約数和(自身を除く): 201839360

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 71, 76, 80, 95, 128, 142, 149, 152, 160, 190, 284, 298, 304, 320, 355, 380, 568, 596, 608, 640, 710, 745, 760, 1136, 1192, 1216, 1349, 1420, 1490, 1520, 2272, 2384, 2432, 2698, 2831, 2840, 2980, 3040, 4544, 4768, 5396, 5662, 5680, 5960, 6080, 6745, 9088, 9536, 10579, 10792, 11324, 11360, 11920, 12160, 13490, 14155, 19072, 21158, 21584, 22648, 22720, 23840, 26980, 28310, 42316, 43168, 45296, 45440, 47680, 52895, 53960, 56620, 84632, 86336, 90592, 95360, 105790, 107920, 113240, 169264, 172672, 181184, 201001, 211580, 215840, 226480, 338528, 362368, 402002, 423160, 431680, 452960, 677056, 804004, 846320, 863360, 905920, 1005005, 1354112, 1608008, 1692640, 1811840, 2010010, 3216016, 3385280, 4020020, 6432032, 6770560, 8040040, 12864064, 16080080, 25728128, 32160160, 64320320, 128640640]

約数ペア:

[(1, 128640640), (2, 64320320), (4, 32160160), (5, 25728128), (8, 16080080), (10, 12864064), (16, 8040040), (19, 6770560), (20, 6432032), (32, 4020020), (38, 3385280), (40, 3216016), (64, 2010010), (71, 1811840), (76, 1692640), (80, 1608008), (95, 1354112), (128, 1005005), (142, 905920), (149, 863360), (152, 846320), (160, 804004), (190, 677056), (284, 452960), (298, 431680), (304, 423160), (320, 402002), (355, 362368), (380, 338528), (568, 226480), (596, 215840), (608, 211580), (640, 201001), (710, 181184), (745, 172672), (760, 169264), (1136, 113240), (1192, 107920), (1216, 105790), (1349, 95360), (1420, 90592), (1490, 86336), (1520, 84632), (2272, 56620), (2384, 53960), (2432, 52895), (2698, 47680), (2831, 45440), (2840, 45296), (2980, 43168), (3040, 42316), (4544, 28310), (4768, 26980), (5396, 23840), (5662, 22720), (5680, 22648), (5960, 21584), (6080, 21158), (6745, 19072), (9088, 14155), (9536, 13490), (10579, 12160), (10792, 11920), (11324, 11360)]