20581211920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1097}}^1\times {\mathrm{12343}}^1$

素因数の和:13472

約数の個数: 80

約数和(自身を含む): 50419808640

約数和(自身を除く): 29838596720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1097, 1520, 2194, 4388, 5485, 8776, 10970, 12343, 17552, 20843, 21940, 24686, 41686, 43880, 49372, 61715, 83372, 87760, 98744, 104215, 123430, 166744, 197488, 208430, 234517, 246860, 333488, 416860, 469034, 493720, 833720, 938068, 987440, 1172585, 1667440, 1876136, 2345170, 3752272, 4690340, 9380680, 13540271, 18761360, 27080542, 54161084, 67701355, 108322168, 135402710, 216644336, 257265149, 270805420, 514530298, 541610840, 1029060596, 1083221680, 1286325745, 2058121192, 2572651490, 4116242384, 5145302980, 10290605960, 20581211920]

約数ペア:

[(1, 20581211920), (2, 10290605960), (4, 5145302980), (5, 4116242384), (8, 2572651490), (10, 2058121192), (16, 1286325745), (19, 1083221680), (20, 1029060596), (38, 541610840), (40, 514530298), (76, 270805420), (80, 257265149), (95, 216644336), (152, 135402710), (190, 108322168), (304, 67701355), (380, 54161084), (760, 27080542), (1097, 18761360), (1520, 13540271), (2194, 9380680), (4388, 4690340), (5485, 3752272), (8776, 2345170), (10970, 1876136), (12343, 1667440), (17552, 1172585), (20843, 987440), (21940, 938068), (24686, 833720), (41686, 493720), (43880, 469034), (49372, 416860), (61715, 333488), (83372, 246860), (87760, 234517), (98744, 208430), (104215, 197488), (123430, 166744)]