20120913520

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1031}}^1\times {\mathrm{2741}}^1$

素因数の和:3874

約数の個数: 80

約数和(自身を含む): 47369914560

約数和(自身を除く): 27249001040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1031, 1424, 1780, 2062, 2741, 3560, 4124, 5155, 5482, 7120, 8248, 10310, 10964, 13705, 16496, 20620, 21928, 27410, 41240, 43856, 54820, 82480, 91759, 109640, 183518, 219280, 243949, 367036, 458795, 487898, 734072, 917590, 975796, 1219745, 1468144, 1835180, 1951592, 2439490, 2825971, 3670360, 3903184, 4878980, 5651942, 7340720, 9757960, 11303884, 14129855, 19515920, 22607768, 28259710, 45215536, 56519420, 113038840, 226077680, 251511419, 503022838, 1006045676, 1257557095, 2012091352, 2515114190, 4024182704, 5030228380, 10060456760, 20120913520]

約数ペア:

[(1, 20120913520), (2, 10060456760), (4, 5030228380), (5, 4024182704), (8, 2515114190), (10, 2012091352), (16, 1257557095), (20, 1006045676), (40, 503022838), (80, 251511419), (89, 226077680), (178, 113038840), (356, 56519420), (445, 45215536), (712, 28259710), (890, 22607768), (1031, 19515920), (1424, 14129855), (1780, 11303884), (2062, 9757960), (2741, 7340720), (3560, 5651942), (4124, 4878980), (5155, 3903184), (5482, 3670360), (7120, 2825971), (8248, 2439490), (10310, 1951592), (10964, 1835180), (13705, 1468144), (16496, 1219745), (20620, 975796), (21928, 917590), (27410, 734072), (41240, 487898), (43856, 458795), (54820, 367036), (82480, 243949), (91759, 219280), (109640, 183518)]