20641218560

素因数分解:

$2^{20}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1$

素因数の和:203

約数の個数: 168

約数和(自身を含む): 51539582976

約数和(自身を除く): 30898364416

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 127, 128, 155, 160, 248, 254, 256, 310, 320, 496, 508, 512, 620, 635, 640, 992, 1016, 1024, 1240, 1270, 1280, 1984, 2032, 2048, 2480, 2540, 2560, 3937, 3968, 4064, 4096, 4960, 5080, 5120, 7874, 7936, 8128, 8192, 9920, 10160, 10240, 15748, 15872, 16256, 16384, 19685, 19840, 20320, 20480, 31496, 31744, 32512, 32768, 39370, 39680, 40640, 40960, 62992, 63488, 65024, 65536, 78740, 79360, 81280, 81920, 125984, 126976, 130048, 131072, 157480, 158720, 162560, 163840, 251968, 253952, 260096, 262144, 314960, 317440, 325120, 327680, 503936, 507904, 520192, 524288, 629920, 634880, 650240, 655360, 1007872, 1015808, 1040384, 1048576, 1259840, 1269760, 1300480, 1310720, 2015744, 2031616, 2080768, 2519680, 2539520, 2600960, 2621440, 4031488, 4063232, 4161536, 5039360, 5079040, 5201920, 5242880, 8062976, 8126464, 8323072, 10078720, 10158080, 10403840, 16125952, 16252928, 16646144, 20157440, 20316160, 20807680, 32251904, 32505856, 33292288, 40314880, 40632320, 41615360, 64503808, 66584576, 80629760, 81264640, 83230720, 129007616, 133169152, 161259520, 162529280, 166461440, 258015232, 322519040, 332922880, 516030464, 645038080, 665845760, 1032060928, 1290076160, 2064121856, 2580152320, 4128243712, 5160304640, 10320609280, 20641218560]

約数ペア:

[(1, 20641218560), (2, 10320609280), (4, 5160304640), (5, 4128243712), (8, 2580152320), (10, 2064121856), (16, 1290076160), (20, 1032060928), (31, 665845760), (32, 645038080), (40, 516030464), (62, 332922880), (64, 322519040), (80, 258015232), (124, 166461440), (127, 162529280), (128, 161259520), (155, 133169152), (160, 129007616), (248, 83230720), (254, 81264640), (256, 80629760), (310, 66584576), (320, 64503808), (496, 41615360), (508, 40632320), (512, 40314880), (620, 33292288), (635, 32505856), (640, 32251904), (992, 20807680), (1016, 20316160), (1024, 20157440), (1240, 16646144), (1270, 16252928), (1280, 16125952), (1984, 10403840), (2032, 10158080), (2048, 10078720), (2480, 8323072), (2540, 8126464), (2560, 8062976), (3937, 5242880), (3968, 5201920), (4064, 5079040), (4096, 5039360), (4960, 4161536), (5080, 4063232), (5120, 4031488), (7874, 2621440), (7936, 2600960), (8128, 2539520), (8192, 2519680), (9920, 2080768), (10160, 2031616), (10240, 2015744), (15748, 1310720), (15872, 1300480), (16256, 1269760), (16384, 1259840), (19685, 1048576), (19840, 1040384), (20320, 1015808), (20480, 1007872), (31496, 655360), (31744, 650240), (32512, 634880), (32768, 629920), (39370, 524288), (39680, 520192), (40640, 507904), (40960, 503936), (62992, 327680), (63488, 325120), (65024, 317440), (65536, 314960), (78740, 262144), (79360, 260096), (81280, 253952), (81920, 251968), (125984, 163840), (126976, 162560), (130048, 158720), (131072, 157480)]