81481120

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{547}}^1$

素因数の和:595

約数の個数: 144

約数和(自身を含む): 236144160

約数和(自身を除く): 154663040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 49, 56, 70, 76, 80, 95, 98, 112, 133, 140, 152, 160, 190, 196, 224, 245, 266, 280, 304, 380, 392, 490, 532, 547, 560, 608, 665, 760, 784, 931, 980, 1064, 1094, 1120, 1330, 1520, 1568, 1862, 1960, 2128, 2188, 2660, 2735, 3040, 3724, 3829, 3920, 4256, 4376, 4655, 5320, 5470, 7448, 7658, 7840, 8752, 9310, 10393, 10640, 10940, 14896, 15316, 17504, 18620, 19145, 20786, 21280, 21880, 26803, 29792, 30632, 37240, 38290, 41572, 43760, 51965, 53606, 61264, 72751, 74480, 76580, 83144, 87520, 103930, 107212, 122528, 134015, 145502, 148960, 153160, 166288, 207860, 214424, 268030, 291004, 306320, 332576, 363755, 415720, 428848, 509257, 536060, 582008, 612640, 727510, 831440, 857696, 1018514, 1072120, 1164016, 1455020, 1662880, 2037028, 2144240, 2328032, 2546285, 2910040, 4074056, 4288480, 5092570, 5820080, 8148112, 10185140, 11640160, 16296224, 20370280, 40740560, 81481120]

約数ペア:

[(1, 81481120), (2, 40740560), (4, 20370280), (5, 16296224), (7, 11640160), (8, 10185140), (10, 8148112), (14, 5820080), (16, 5092570), (19, 4288480), (20, 4074056), (28, 2910040), (32, 2546285), (35, 2328032), (38, 2144240), (40, 2037028), (49, 1662880), (56, 1455020), (70, 1164016), (76, 1072120), (80, 1018514), (95, 857696), (98, 831440), (112, 727510), (133, 612640), (140, 582008), (152, 536060), (160, 509257), (190, 428848), (196, 415720), (224, 363755), (245, 332576), (266, 306320), (280, 291004), (304, 268030), (380, 214424), (392, 207860), (490, 166288), (532, 153160), (547, 148960), (560, 145502), (608, 134015), (665, 122528), (760, 107212), (784, 103930), (931, 87520), (980, 83144), (1064, 76580), (1094, 74480), (1120, 72751), (1330, 61264), (1520, 53606), (1568, 51965), (1862, 43760), (1960, 41572), (2128, 38290), (2188, 37240), (2660, 30632), (2735, 29792), (3040, 26803), (3724, 21880), (3829, 21280), (3920, 20786), (4256, 19145), (4376, 18620), (4655, 17504), (5320, 15316), (5470, 14896), (7448, 10940), (7658, 10640), (7840, 10393), (8752, 9310)]