21000273855

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{1321}}^1$

素因数の和:1493

約数の個数: 128

約数和(自身を含む): 39474708480

約数和(自身を除く): 18474434625

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 59, 69, 71, 115, 165, 177, 213, 253, 295, 345, 355, 649, 759, 781, 885, 1065, 1265, 1321, 1357, 1633, 1947, 2343, 3245, 3795, 3905, 3963, 4071, 4189, 4899, 6605, 6785, 8165, 9735, 11715, 12567, 14531, 14927, 17963, 19815, 20355, 20945, 24495, 30383, 43593, 44781, 46079, 53889, 62835, 72655, 74635, 77939, 89815, 91149, 93791, 96347, 138237, 151915, 217965, 223905, 230395, 233817, 269445, 281373, 289041, 334213, 389695, 455745, 468955, 481735, 691185, 857329, 1002639, 1031701, 1059817, 1169085, 1406865, 1445205, 1671065, 1792597, 2157193, 2571987, 3095103, 3179451, 4286645, 5013195, 5158505, 5299085, 5377791, 5533669, 6471579, 8962985, 10785965, 12859935, 15475515, 15897255, 16601007, 19718567, 23729123, 26888955, 27668345, 32357895, 59155701, 60870359, 71187369, 83005035, 98592835, 118645615, 127274387, 182611077, 295778505, 304351795, 355936845, 381823161, 636371935, 913055385, 1400018257, 1909115805, 4200054771, 7000091285, 21000273855]

約数ペア:

[(1, 21000273855), (3, 7000091285), (5, 4200054771), (11, 1909115805), (15, 1400018257), (23, 913055385), (33, 636371935), (55, 381823161), (59, 355936845), (69, 304351795), (71, 295778505), (115, 182611077), (165, 127274387), (177, 118645615), (213, 98592835), (253, 83005035), (295, 71187369), (345, 60870359), (355, 59155701), (649, 32357895), (759, 27668345), (781, 26888955), (885, 23729123), (1065, 19718567), (1265, 16601007), (1321, 15897255), (1357, 15475515), (1633, 12859935), (1947, 10785965), (2343, 8962985), (3245, 6471579), (3795, 5533669), (3905, 5377791), (3963, 5299085), (4071, 5158505), (4189, 5013195), (4899, 4286645), (6605, 3179451), (6785, 3095103), (8165, 2571987), (9735, 2157193), (11715, 1792597), (12567, 1671065), (14531, 1445205), (14927, 1406865), (17963, 1169085), (19815, 1059817), (20355, 1031701), (20945, 1002639), (24495, 857329), (30383, 691185), (43593, 481735), (44781, 468955), (46079, 455745), (53889, 389695), (62835, 334213), (72655, 289041), (74635, 281373), (77939, 269445), (89815, 233817), (91149, 230395), (93791, 223905), (96347, 217965), (138237, 151915)]