21000456820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{547}}^1\times {\mathrm{11923}}^1$

素因数の和:12509

約数の個数: 96

約数和(自身を含む): 52693014528

約数和(自身を除く): 31692557708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 547, 644, 805, 1094, 1610, 2188, 2735, 3220, 3829, 5470, 7658, 10940, 11923, 12581, 15316, 19145, 23846, 25162, 38290, 47692, 50324, 59615, 62905, 76580, 83461, 88067, 119230, 125810, 166922, 176134, 238460, 251620, 274229, 333844, 352268, 417305, 440335, 548458, 834610, 880670, 1096916, 1371145, 1669220, 1761340, 1919603, 2742290, 3839206, 5484580, 6521881, 7678412, 9598015, 13043762, 19196030, 26087524, 32609405, 38392060, 45653167, 65218810, 91306334, 130437620, 150003263, 182612668, 228265835, 300006526, 456531670, 600013052, 750016315, 913063340, 1050022841, 1500032630, 2100045682, 3000065260, 4200091364, 5250114205, 10500228410, 21000456820]

約数ペア:

[(1, 21000456820), (2, 10500228410), (4, 5250114205), (5, 4200091364), (7, 3000065260), (10, 2100045682), (14, 1500032630), (20, 1050022841), (23, 913063340), (28, 750016315), (35, 600013052), (46, 456531670), (70, 300006526), (92, 228265835), (115, 182612668), (140, 150003263), (161, 130437620), (230, 91306334), (322, 65218810), (460, 45653167), (547, 38392060), (644, 32609405), (805, 26087524), (1094, 19196030), (1610, 13043762), (2188, 9598015), (2735, 7678412), (3220, 6521881), (3829, 5484580), (5470, 3839206), (7658, 2742290), (10940, 1919603), (11923, 1761340), (12581, 1669220), (15316, 1371145), (19145, 1096916), (23846, 880670), (25162, 834610), (38290, 548458), (47692, 440335), (50324, 417305), (59615, 352268), (62905, 333844), (76580, 274229), (83461, 251620), (88067, 238460), (119230, 176134), (125810, 166922)]