81129160

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{191}}^1$

素因数の和:287

約数の個数: 128

約数和(自身を含む): 220631040

約数和(自身を除く): 139501880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 41, 56, 70, 74, 82, 140, 148, 164, 185, 191, 205, 259, 280, 287, 296, 328, 370, 382, 410, 518, 574, 740, 764, 820, 955, 1036, 1148, 1295, 1337, 1435, 1480, 1517, 1528, 1640, 1910, 2072, 2296, 2590, 2674, 2870, 3034, 3820, 5180, 5348, 5740, 6068, 6685, 7067, 7585, 7640, 7831, 10360, 10619, 10696, 11480, 12136, 13370, 14134, 15170, 15662, 21238, 26740, 28268, 30340, 31324, 35335, 39155, 42476, 49469, 53095, 53480, 54817, 56536, 60680, 62648, 70670, 78310, 84952, 98938, 106190, 109634, 141340, 156620, 197876, 212380, 219268, 247345, 274085, 282680, 289747, 313240, 395752, 424760, 438536, 494690, 548170, 579494, 989380, 1096340, 1158988, 1448735, 1978760, 2028229, 2192680, 2317976, 2897470, 4056458, 5794940, 8112916, 10141145, 11589880, 16225832, 20282290, 40564580, 81129160]

約数ペア:

[(1, 81129160), (2, 40564580), (4, 20282290), (5, 16225832), (7, 11589880), (8, 10141145), (10, 8112916), (14, 5794940), (20, 4056458), (28, 2897470), (35, 2317976), (37, 2192680), (40, 2028229), (41, 1978760), (56, 1448735), (70, 1158988), (74, 1096340), (82, 989380), (140, 579494), (148, 548170), (164, 494690), (185, 438536), (191, 424760), (205, 395752), (259, 313240), (280, 289747), (287, 282680), (296, 274085), (328, 247345), (370, 219268), (382, 212380), (410, 197876), (518, 156620), (574, 141340), (740, 109634), (764, 106190), (820, 98938), (955, 84952), (1036, 78310), (1148, 70670), (1295, 62648), (1337, 60680), (1435, 56536), (1480, 54817), (1517, 53480), (1528, 53095), (1640, 49469), (1910, 42476), (2072, 39155), (2296, 35335), (2590, 31324), (2674, 30340), (2870, 28268), (3034, 26740), (3820, 21238), (5180, 15662), (5348, 15170), (5740, 14134), (6068, 13370), (6685, 12136), (7067, 11480), (7585, 10696), (7640, 10619), (7831, 10360)]