81606720

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{503}}^1$

素因数の和:549

約数の個数: 168

約数和(自身を含む): 281123136

約数和(自身を除く): 199516416

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 130, 156, 160, 169, 192, 195, 208, 240, 260, 312, 320, 338, 390, 416, 480, 503, 507, 520, 624, 676, 780, 832, 845, 960, 1006, 1014, 1040, 1248, 1352, 1509, 1560, 1690, 2012, 2028, 2080, 2496, 2515, 2535, 2704, 3018, 3120, 3380, 4024, 4056, 4160, 5030, 5070, 5408, 6036, 6240, 6539, 6760, 7545, 8048, 8112, 10060, 10140, 10816, 12072, 12480, 13078, 13520, 15090, 16096, 16224, 19617, 20120, 20280, 24144, 26156, 27040, 30180, 32192, 32448, 32695, 39234, 40240, 40560, 48288, 52312, 54080, 60360, 65390, 78468, 80480, 81120, 85007, 96576, 98085, 104624, 120720, 130780, 156936, 160960, 162240, 170014, 196170, 209248, 241440, 255021, 261560, 313872, 340028, 392340, 418496, 425035, 482880, 510042, 523120, 627744, 680056, 784680, 850070, 1020084, 1046240, 1255488, 1275105, 1360112, 1569360, 1700140, 2040168, 2092480, 2550210, 2720224, 3138720, 3400280, 4080336, 5100420, 5440448, 6277440, 6800560, 8160672, 10200840, 13601120, 16321344, 20401680, 27202240, 40803360, 81606720]

約数ペア:

[(1, 81606720), (2, 40803360), (3, 27202240), (4, 20401680), (5, 16321344), (6, 13601120), (8, 10200840), (10, 8160672), (12, 6800560), (13, 6277440), (15, 5440448), (16, 5100420), (20, 4080336), (24, 3400280), (26, 3138720), (30, 2720224), (32, 2550210), (39, 2092480), (40, 2040168), (48, 1700140), (52, 1569360), (60, 1360112), (64, 1275105), (65, 1255488), (78, 1046240), (80, 1020084), (96, 850070), (104, 784680), (120, 680056), (130, 627744), (156, 523120), (160, 510042), (169, 482880), (192, 425035), (195, 418496), (208, 392340), (240, 340028), (260, 313872), (312, 261560), (320, 255021), (338, 241440), (390, 209248), (416, 196170), (480, 170014), (503, 162240), (507, 160960), (520, 156936), (624, 130780), (676, 120720), (780, 104624), (832, 98085), (845, 96576), (960, 85007), (1006, 81120), (1014, 80480), (1040, 78468), (1248, 65390), (1352, 60360), (1509, 54080), (1560, 52312), (1690, 48288), (2012, 40560), (2028, 40240), (2080, 39234), (2496, 32695), (2515, 32448), (2535, 32192), (2704, 30180), (3018, 27040), (3120, 26156), (3380, 24144), (4024, 20280), (4056, 20120), (4160, 19617), (5030, 16224), (5070, 16096), (5408, 15090), (6036, 13520), (6240, 13078), (6539, 12480), (6760, 12072), (7545, 10816), (8048, 10140), (8112, 10060)]