81281200000

素因数分解:

$2^7\times 5^5\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1$

素因数の和:106

約数の個数: 1152

約数和(自身を含む): 286139498400

約数和(自身を除く): 204858298400

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 20, 22, 25, 26, 28, 29, 32, 35, 40, 44, 49, 50, 52, 55, 56, 58, 64, 65, 70, 77, 80, 88, 91, 98, 100, 104, 110, 112, 116, 125, 128, 130, 140, 143, 145, 154, 160, 175, 176, 182, 196, 200, 203, 208, 220, 224, 232, 245, 250, 260, 275, 280, 286, 290, 308, 319, 320, 325, 350, 352, 364, 377, 385, 392, 400, 406, 416, 440, 448, 455, 464, 490, 500, 520, 539, 550, 560, 572, 580, 616, 625, 637, 638, 640, 650, 700, 704, 715, 725, 728, 754, 770, 784, 800, 812, 832, 875, 880, 896, 910, 928, 980, 1000, 1001, 1015, 1040, 1078, 1100, 1120, 1144, 1160, 1225, 1232, 1250, 1274, 1276, 1300, 1375, 1400, 1408, 1421, 1430, 1450, 1456, 1508, 1540, 1568, 1595, 1600, 1624, 1625, 1664, 1750, 1760, 1820, 1856, 1885, 1925, 1960, 2000, 2002, 2030, 2080, 2156, 2200, 2233, 2240, 2275, 2288, 2320, 2450, 2464, 2500, 2548, 2552, 2600, 2639, 2695, 2750, 2800, 2842, 2860, 2900, 2912, 3016, 3080, 3125, 3136, 3185, 3190, 3200, 3248, 3250, 3500, 3520, 3575, 3625, 3640, 3712, 3770, 3850, 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398750, 400000, 400400, 406000, 406406, 407680, 414700, 422240, 431200, 440000, 446600, 446875, 448448, 454720, 455000, 457600, 461825, 464000, 464464, 471250, 481250, 490000, 500192, 500500, 507500, 509600, 510400, 518375, 520000, 527800, 530816, 539000, 550000, 558250, 560000, 560560, 568400, 568750, 572000, 580000, 580580, 591136, 603200, 612500, 616000, 625240, 625625, 634375, 637000, 638000, 640640, 649600, 650000, 659750, 663520, 673750, 700000, 700700, 710500, 714560, 715000, 725000, 725725, 728000, 738920, 754000, 770000, 781550, 784000, 796250, 797500, 800800, 812000, 812812, 829400, 844480, 862400, 875875, 880000, 888125, 893200, 893750, 896896, 909440, 910000, 923650, 928928, 942500, 962500, 980000, 996875, 1000384, 1001000, 1015000, 1016015, 1019200, 1020800, 1036750, 1040000, 1055600, 1078000, 1100000, 1116500, 1121120, 1136800, 1137500, 1144000, 1160000, 1161160, 1178125, 1182272, 1206400, 1225000, 1232000, 1250480, 1251250, 1268750, 1274000, 1276000, 1300000, 1319500, 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約数ペア:

[(1, 81281200000), (2, 40640600000), (4, 20320300000), (5, 16256240000), (7, 11611600000), (8, 10160150000), (10, 8128120000), (11, 7389200000), (13, 6252400000), (14, 5805800000), (16, 5080075000), (20, 4064060000), (22, 3694600000), (25, 3251248000), (26, 3126200000), (28, 2902900000), (29, 2802800000), (32, 2540037500), (35, 2322320000), (40, 2032030000), (44, 1847300000), (49, 1658800000), (50, 1625624000), (52, 1563100000), (55, 1477840000), (56, 1451450000), (58, 1401400000), (64, 1270018750), (65, 1250480000), (70, 1161160000), (77, 1055600000), (80, 1016015000), (88, 923650000), (91, 893200000), (98, 829400000), (100, 812812000), (104, 781550000), (110, 738920000), (112, 725725000), (116, 700700000), (125, 650249600), (128, 635009375), (130, 625240000), (140, 580580000), (143, 568400000), (145, 560560000), (154, 527800000), (160, 508007500), (175, 464464000), (176, 461825000), (182, 446600000), (196, 414700000), (200, 406406000), (203, 400400000), (208, 390775000), (220, 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