81512970

素因数分解:

$2^1\times 3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{71}}^2$

素因数の和:177

約数の個数: 144

約数和(自身を含む): 251805024

約数和(自身を除く): 170292054

約数列:

[1, 2, 3, 5, 6, 7, 10, 11, 14, 15, 21, 22, 30, 33, 35, 42, 49, 55, 66, 70, 71, 77, 98, 105, 110, 142, 147, 154, 165, 210, 213, 231, 245, 294, 330, 355, 385, 426, 462, 490, 497, 539, 710, 735, 770, 781, 994, 1065, 1078, 1155, 1470, 1491, 1562, 1617, 2130, 2310, 2343, 2485, 2695, 2982, 3234, 3479, 3905, 4686, 4970, 5041, 5390, 5467, 6958, 7455, 7810, 8085, 10082, 10437, 10934, 11715, 14910, 15123, 16170, 16401, 17395, 20874, 23430, 25205, 27335, 30246, 32802, 34790, 35287, 38269, 50410, 52185, 54670, 55451, 70574, 75615, 76538, 82005, 104370, 105861, 110902, 114807, 151230, 164010, 166353, 176435, 191345, 211722, 229614, 247009, 277255, 332706, 352870, 382690, 388157, 494018, 529305, 554510, 574035, 741027, 776314, 831765, 1058610, 1148070, 1164471, 1235045, 1482054, 1663530, 1940785, 2328942, 2470090, 2717099, 3705135, 3881570, 5434198, 5822355, 7410270, 8151297, 11644710, 13585495, 16302594, 27170990, 40756485, 81512970]

約数ペア:

[(1, 81512970), (2, 40756485), (3, 27170990), (5, 16302594), (6, 13585495), (7, 11644710), (10, 8151297), (11, 7410270), (14, 5822355), (15, 5434198), (21, 3881570), (22, 3705135), (30, 2717099), (33, 2470090), (35, 2328942), (42, 1940785), (49, 1663530), (55, 1482054), (66, 1235045), (70, 1164471), (71, 1148070), (77, 1058610), (98, 831765), (105, 776314), (110, 741027), (142, 574035), (147, 554510), (154, 529305), (165, 494018), (210, 388157), (213, 382690), (231, 352870), (245, 332706), (294, 277255), (330, 247009), (355, 229614), (385, 211722), (426, 191345), (462, 176435), (490, 166353), (497, 164010), (539, 151230), (710, 114807), (735, 110902), (770, 105861), (781, 104370), (994, 82005), (1065, 76538), (1078, 75615), (1155, 70574), (1470, 55451), (1491, 54670), (1562, 52185), (1617, 50410), (2130, 38269), (2310, 35287), (2343, 34790), (2485, 32802), (2695, 30246), (2982, 27335), (3234, 25205), (3479, 23430), (3905, 20874), (4686, 17395), (4970, 16401), (5041, 16170), (5390, 15123), (5467, 14910), (6958, 11715), (7455, 10934), (7810, 10437), (8085, 10082)]