638689280

素因数分解:

$2^{13}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{503}}^1$

素因数の和:565

約数の個数: 112

約数和(自身を含む): 1585350144

約数和(自身を除く): 946660864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 503, 512, 620, 640, 992, 1006, 1024, 1240, 1280, 1984, 2012, 2048, 2480, 2515, 2560, 3968, 4024, 4096, 4960, 5030, 5120, 7936, 8048, 8192, 9920, 10060, 10240, 15593, 15872, 16096, 19840, 20120, 20480, 31186, 31744, 32192, 39680, 40240, 40960, 62372, 63488, 64384, 77965, 79360, 80480, 124744, 126976, 128768, 155930, 158720, 160960, 249488, 253952, 257536, 311860, 317440, 321920, 498976, 515072, 623720, 634880, 643840, 997952, 1030144, 1247440, 1269760, 1287680, 1995904, 2060288, 2494880, 2575360, 3991808, 4120576, 4989760, 5150720, 7983616, 9979520, 10301440, 15967232, 19959040, 20602880, 31934464, 39918080, 63868928, 79836160, 127737856, 159672320, 319344640, 638689280]

約数ペア:

[(1, 638689280), (2, 319344640), (4, 159672320), (5, 127737856), (8, 79836160), (10, 63868928), (16, 39918080), (20, 31934464), (31, 20602880), (32, 19959040), (40, 15967232), (62, 10301440), (64, 9979520), (80, 7983616), (124, 5150720), (128, 4989760), (155, 4120576), (160, 3991808), (248, 2575360), (256, 2494880), (310, 2060288), (320, 1995904), (496, 1287680), (503, 1269760), (512, 1247440), (620, 1030144), (640, 997952), (992, 643840), (1006, 634880), (1024, 623720), (1240, 515072), (1280, 498976), (1984, 321920), (2012, 317440), (2048, 311860), (2480, 257536), (2515, 253952), (2560, 249488), (3968, 160960), (4024, 158720), (4096, 155930), (4960, 128768), (5030, 126976), (5120, 124744), (7936, 80480), (8048, 79360), (8192, 77965), (9920, 64384), (10060, 63488), (10240, 62372), (15593, 40960), (15872, 40240), (16096, 39680), (19840, 32192), (20120, 31744), (20480, 31186)]