20689968040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{263}}^1\times {\mathrm{1471}}^1$

素因数の和:1943

約数の個数: 128

約数和(自身を含む): 53721169920

約数和(自身を除く): 33031201880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 191, 263, 280, 382, 526, 764, 955, 1052, 1315, 1337, 1471, 1528, 1841, 1910, 2104, 2630, 2674, 2942, 3682, 3820, 5260, 5348, 5884, 6685, 7355, 7364, 7640, 9205, 10297, 10520, 10696, 11768, 13370, 14710, 14728, 18410, 20594, 26740, 29420, 36820, 41188, 50233, 51485, 53480, 58840, 73640, 82376, 100466, 102970, 200932, 205940, 251165, 280961, 351631, 386873, 401864, 411880, 502330, 561922, 703262, 773746, 1004660, 1123844, 1404805, 1406524, 1547492, 1758155, 1934365, 1966727, 2009320, 2247688, 2708111, 2809610, 2813048, 3094984, 3516310, 3868730, 3933454, 5416222, 5619220, 7032620, 7737460, 7866908, 9833635, 10832444, 11238440, 13540555, 14065240, 15474920, 15733816, 19667270, 21664888, 27081110, 39334540, 54162220, 73892743, 78669080, 108324440, 147785486, 295570972, 369463715, 517249201, 591141944, 738927430, 1034498402, 1477854860, 2068996804, 2586246005, 2955709720, 4137993608, 5172492010, 10344984020, 20689968040]

約数ペア:

[(1, 20689968040), (2, 10344984020), (4, 5172492010), (5, 4137993608), (7, 2955709720), (8, 2586246005), (10, 2068996804), (14, 1477854860), (20, 1034498402), (28, 738927430), (35, 591141944), (40, 517249201), (56, 369463715), (70, 295570972), (140, 147785486), (191, 108324440), (263, 78669080), (280, 73892743), (382, 54162220), (526, 39334540), (764, 27081110), (955, 21664888), (1052, 19667270), (1315, 15733816), (1337, 15474920), (1471, 14065240), (1528, 13540555), (1841, 11238440), (1910, 10832444), (2104, 9833635), (2630, 7866908), (2674, 7737460), (2942, 7032620), (3682, 5619220), (3820, 5416222), (5260, 3933454), (5348, 3868730), (5884, 3516310), (6685, 3094984), (7355, 2813048), (7364, 2809610), (7640, 2708111), (9205, 2247688), (10297, 2009320), (10520, 1966727), (10696, 1934365), (11768, 1758155), (13370, 1547492), (14710, 1406524), (14728, 1404805), (18410, 1123844), (20594, 1004660), (26740, 773746), (29420, 703262), (36820, 561922), (41188, 502330), (50233, 411880), (51485, 401864), (53480, 386873), (58840, 351631), (73640, 280961), (82376, 251165), (100466, 205940), (102970, 200932)]