81961880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:154

約数の個数: 256

約数和(自身を含む): 261273600

約数和(自身を除く): 179311720

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 20, 22, 23, 26, 28, 35, 40, 44, 46, 52, 55, 56, 65, 70, 77, 88, 89, 91, 92, 104, 110, 115, 130, 140, 143, 154, 161, 178, 182, 184, 220, 230, 253, 260, 280, 286, 299, 308, 322, 356, 364, 385, 440, 445, 455, 460, 506, 520, 572, 598, 616, 623, 644, 712, 715, 728, 770, 805, 890, 910, 920, 979, 1001, 1012, 1144, 1157, 1196, 1246, 1265, 1288, 1430, 1495, 1540, 1610, 1771, 1780, 1820, 1958, 2002, 2024, 2047, 2093, 2314, 2392, 2492, 2530, 2860, 2990, 3080, 3115, 3220, 3289, 3542, 3560, 3640, 3916, 4004, 4094, 4186, 4628, 4895, 4984, 5005, 5060, 5720, 5785, 5980, 6230, 6440, 6578, 6853, 7084, 7832, 8008, 8099, 8188, 8372, 8855, 9256, 9790, 10010, 10120, 10235, 10465, 11570, 11960, 12460, 12727, 13156, 13706, 14168, 14329, 16198, 16376, 16445, 16744, 17710, 19580, 20020, 20470, 20930, 22517, 23023, 23140, 24920, 25454, 26312, 26611, 27412, 28658, 32396, 32890, 34265, 35420, 39160, 40040, 40495, 40940, 41860, 45034, 46046, 46280, 50908, 53222, 54824, 57316, 63635, 64792, 65780, 68530, 70840, 71645, 80990, 81880, 83720, 89089, 90068, 92092, 101816, 106444, 112585, 114632, 115115, 127270, 131560, 133055, 137060, 143290, 157619, 161980, 178178, 180136, 184184, 186277, 212888, 225170, 230230, 254540, 266110, 274120, 286580, 292721, 315238, 323960, 356356, 372554, 445445, 450340, 460460, 509080, 532220, 573160, 585442, 630476, 712712, 745108, 788095, 890890, 900680, 920920, 931385, 1064440, 1170884, 1260952, 1463605, 1490216, 1576190, 1781780, 1862770, 2049047, 2341768, 2927210, 3152380, 3563560, 3725540, 4098094, 5854420, 6304760, 7451080, 8196188, 10245235, 11708840, 16392376, 20490470, 40980940, 81961880]

約数ペア:

[(1, 81961880), (2, 40980940), (4, 20490470), (5, 16392376), (7, 11708840), (8, 10245235), (10, 8196188), (11, 7451080), (13, 6304760), (14, 5854420), (20, 4098094), (22, 3725540), (23, 3563560), (26, 3152380), (28, 2927210), (35, 2341768), (40, 2049047), (44, 1862770), (46, 1781780), (52, 1576190), (55, 1490216), (56, 1463605), (65, 1260952), (70, 1170884), (77, 1064440), (88, 931385), (89, 920920), (91, 900680), (92, 890890), (104, 788095), (110, 745108), (115, 712712), (130, 630476), (140, 585442), (143, 573160), (154, 532220), (161, 509080), (178, 460460), (182, 450340), (184, 445445), (220, 372554), (230, 356356), (253, 323960), (260, 315238), (280, 292721), (286, 286580), (299, 274120), (308, 266110), (322, 254540), (356, 230230), (364, 225170), (385, 212888), (440, 186277), (445, 184184), (455, 180136), (460, 178178), (506, 161980), (520, 157619), (572, 143290), (598, 137060), (616, 133055), (623, 131560), (644, 127270), (712, 115115), (715, 114632), (728, 112585), (770, 106444), (805, 101816), (890, 92092), (910, 90068), (920, 89089), (979, 83720), (1001, 81880), (1012, 80990), (1144, 71645), (1157, 70840), (1196, 68530), (1246, 65780), (1265, 64792), (1288, 63635), (1430, 57316), (1495, 54824), (1540, 53222), (1610, 50908), (1771, 46280), (1780, 46046), (1820, 45034), (1958, 41860), (2002, 40940), (2024, 40495), (2047, 40040), (2093, 39160), (2314, 35420), (2392, 34265), (2492, 32890), (2530, 32396), (2860, 28658), (2990, 27412), (3080, 26611), (3115, 26312), (3220, 25454), (3289, 24920), (3542, 23140), (3560, 23023), (3640, 22517), (3916, 20930), (4004, 20470), (4094, 20020), (4186, 19580), (4628, 17710), (4895, 16744), (4984, 16445), (5005, 16376), (5060, 16198), (5720, 14329), (5785, 14168), (5980, 13706), (6230, 13156), (6440, 12727), (6578, 12460), (6853, 11960), (7084, 11570), (7832, 10465), (8008, 10235), (8099, 10120), (8188, 10010), (8372, 9790), (8855, 9256)]