20991022910

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:315

約数の個数: 256

約数和(自身を含む): 47969832960

約数和(自身を除く): 26978810050

約数列:

[1, 2, 5, 10, 11, 13, 22, 23, 26, 46, 55, 65, 71, 89, 101, 110, 115, 130, 142, 143, 178, 202, 230, 253, 286, 299, 355, 445, 505, 506, 598, 710, 715, 781, 890, 923, 979, 1010, 1111, 1157, 1265, 1313, 1430, 1495, 1562, 1633, 1846, 1958, 2047, 2222, 2314, 2323, 2530, 2626, 2990, 3266, 3289, 3905, 4094, 4615, 4646, 4895, 5555, 5785, 6319, 6565, 6578, 7171, 7810, 8165, 8989, 9230, 9790, 10153, 10235, 11110, 11570, 11615, 12638, 12727, 13130, 14342, 14443, 16330, 16445, 17963, 17978, 20306, 20470, 21229, 22517, 23230, 25454, 25553, 26611, 28886, 30199, 31595, 32890, 35855, 35926, 42458, 44945, 45034, 50765, 51106, 53222, 60398, 63190, 63635, 69509, 71710, 72215, 78881, 82147, 89815, 89890, 93223, 98879, 101530, 106145, 112585, 116857, 127270, 127765, 133055, 139018, 144430, 145337, 150995, 157762, 164294, 164933, 179630, 186446, 197758, 206747, 212290, 225170, 233519, 233714, 255530, 266110, 290674, 292721, 301990, 329866, 332189, 347545, 394405, 410735, 413494, 466115, 467038, 494395, 584285, 585442, 638219, 664378, 695090, 726685, 788810, 821470, 824665, 903617, 932230, 988790, 1025453, 1033735, 1167595, 1168570, 1276438, 1285427, 1453370, 1463605, 1598707, 1649330, 1660945, 1807234, 1814263, 1889381, 2050906, 2067470, 2144129, 2274217, 2335190, 2570854, 2687711, 2927210, 3191095, 3197414, 3321890, 3628526, 3778762, 4288258, 4518085, 4548434, 5127265, 5375422, 6382190, 6427135, 7020409, 7993535, 8296847, 9036170, 9071315, 9446905, 10254530, 10720645, 11371085, 12854270, 13438555, 14040818, 14679037, 15987070, 16593694, 18142630, 18893810, 20783191, 21441290, 22742170, 23585419, 26877110, 29358074, 29564821, 35102045, 41484235, 41566382, 47170838, 59129642, 70204090, 73395185, 82968470, 91265317, 103915955, 117927095, 146790370, 147824105, 161469407, 182530634, 190827481, 207831910, 235854190, 295648210, 322938814, 381654962, 456326585, 807347035, 912653170, 954137405, 1614694070, 1908274810, 2099102291, 4198204582, 10495511455, 20991022910]

約数ペア:

[(1, 20991022910), (2, 10495511455), (5, 4198204582), (10, 2099102291), (11, 1908274810), (13, 1614694070), (22, 954137405), (23, 912653170), (26, 807347035), (46, 456326585), (55, 381654962), (65, 322938814), (71, 295648210), (89, 235854190), (101, 207831910), (110, 190827481), (115, 182530634), (130, 161469407), (142, 147824105), (143, 146790370), (178, 117927095), (202, 103915955), (230, 91265317), (253, 82968470), (286, 73395185), (299, 70204090), (355, 59129642), (445, 47170838), (505, 41566382), (506, 41484235), (598, 35102045), (710, 29564821), (715, 29358074), (781, 26877110), (890, 23585419), (923, 22742170), (979, 21441290), (1010, 20783191), (1111, 18893810), (1157, 18142630), (1265, 16593694), (1313, 15987070), (1430, 14679037), (1495, 14040818), (1562, 13438555), (1633, 12854270), (1846, 11371085), (1958, 10720645), (2047, 10254530), (2222, 9446905), (2314, 9071315), (2323, 9036170), (2530, 8296847), (2626, 7993535), (2990, 7020409), (3266, 6427135), (3289, 6382190), (3905, 5375422), (4094, 5127265), (4615, 4548434), (4646, 4518085), (4895, 4288258), (5555, 3778762), (5785, 3628526), (6319, 3321890), (6565, 3197414), (6578, 3191095), (7171, 2927210), (7810, 2687711), (8165, 2570854), (8989, 2335190), (9230, 2274217), (9790, 2144129), (10153, 2067470), (10235, 2050906), (11110, 1889381), (11570, 1814263), (11615, 1807234), (12638, 1660945), (12727, 1649330), (13130, 1598707), (14342, 1463605), (14443, 1453370), (16330, 1285427), (16445, 1276438), (17963, 1168570), (17978, 1167595), (20306, 1033735), (20470, 1025453), (21229, 988790), (22517, 932230), (23230, 903617), (25454, 824665), (25553, 821470), (26611, 788810), (28886, 726685), (30199, 695090), (31595, 664378), (32890, 638219), (35855, 585442), (35926, 584285), (42458, 494395), (44945, 467038), (45034, 466115), (50765, 413494), (51106, 410735), (53222, 394405), (60398, 347545), (63190, 332189), (63635, 329866), (69509, 301990), (71710, 292721), (72215, 290674), (78881, 266110), (82147, 255530), (89815, 233714), (89890, 233519), (93223, 225170), (98879, 212290), (101530, 206747), (106145, 197758), (112585, 186446), (116857, 179630), (127270, 164933), (127765, 164294), (133055, 157762), (139018, 150995), (144430, 145337)]