640370720

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^3\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:176

約数の個数: 192

約数和(自身を含む): 1735437312

約数和(自身を除く): 1095066592

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 32, 40, 44, 55, 62, 80, 88, 97, 110, 121, 124, 155, 160, 176, 194, 220, 242, 248, 310, 341, 352, 388, 440, 484, 485, 496, 605, 620, 682, 776, 880, 968, 970, 992, 1067, 1210, 1240, 1331, 1364, 1552, 1705, 1760, 1936, 1940, 2134, 2420, 2480, 2662, 2728, 3007, 3104, 3410, 3751, 3872, 3880, 4268, 4840, 4960, 5324, 5335, 5456, 6014, 6655, 6820, 7502, 7760, 8536, 9680, 10648, 10670, 10912, 11737, 12028, 13310, 13640, 15004, 15035, 15520, 17072, 18755, 19360, 21296, 21340, 23474, 24056, 26620, 27280, 30008, 30070, 33077, 34144, 37510, 41261, 42592, 42680, 46948, 48112, 53240, 54560, 58685, 60016, 60140, 66154, 75020, 82522, 85360, 93896, 96224, 106480, 117370, 120032, 120280, 129107, 132308, 150040, 165044, 165385, 170720, 187792, 206305, 212960, 234740, 240560, 258214, 264616, 300080, 330088, 330770, 363847, 375584, 412610, 469480, 481120, 516428, 529232, 600160, 645535, 660176, 661540, 727694, 825220, 938960, 1032856, 1058464, 1291070, 1320352, 1323080, 1455388, 1650440, 1819235, 1877920, 2065712, 2582140, 2646160, 2910776, 3300880, 3638470, 4002317, 4131424, 5164280, 5292320, 5821552, 6601760, 7276940, 8004634, 10328560, 11643104, 14553880, 16009268, 20011585, 20657120, 29107760, 32018536, 40023170, 58215520, 64037072, 80046340, 128074144, 160092680, 320185360, 640370720]

約数ペア:

[(1, 640370720), (2, 320185360), (4, 160092680), (5, 128074144), (8, 80046340), (10, 64037072), (11, 58215520), (16, 40023170), (20, 32018536), (22, 29107760), (31, 20657120), (32, 20011585), (40, 16009268), (44, 14553880), (55, 11643104), (62, 10328560), (80, 8004634), (88, 7276940), (97, 6601760), (110, 5821552), (121, 5292320), (124, 5164280), (155, 4131424), (160, 4002317), (176, 3638470), (194, 3300880), (220, 2910776), (242, 2646160), (248, 2582140), (310, 2065712), (341, 1877920), (352, 1819235), (388, 1650440), (440, 1455388), (484, 1323080), (485, 1320352), (496, 1291070), (605, 1058464), (620, 1032856), (682, 938960), (776, 825220), (880, 727694), (968, 661540), (970, 660176), (992, 645535), (1067, 600160), (1210, 529232), (1240, 516428), (1331, 481120), (1364, 469480), (1552, 412610), (1705, 375584), (1760, 363847), (1936, 330770), (1940, 330088), (2134, 300080), (2420, 264616), (2480, 258214), (2662, 240560), (2728, 234740), (3007, 212960), (3104, 206305), (3410, 187792), (3751, 170720), (3872, 165385), (3880, 165044), (4268, 150040), (4840, 132308), (4960, 129107), (5324, 120280), (5335, 120032), (5456, 117370), (6014, 106480), (6655, 96224), (6820, 93896), (7502, 85360), (7760, 82522), (8536, 75020), (9680, 66154), (10648, 60140), (10670, 60016), (10912, 58685), (11737, 54560), (12028, 53240), (13310, 48112), (13640, 46948), (15004, 42680), (15035, 42592), (15520, 41261), (17072, 37510), (18755, 34144), (19360, 33077), (21296, 30070), (21340, 30008), (23474, 27280), (24056, 26620)]