256131920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{229}}^1$

素因数の和:325

約数の個数: 160

約数和(自身を含む): 689955840

約数和(自身を除く): 433823920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 40, 41, 44, 55, 62, 80, 82, 88, 110, 124, 155, 164, 176, 205, 220, 229, 248, 310, 328, 341, 410, 440, 451, 458, 496, 620, 656, 682, 820, 880, 902, 916, 1145, 1240, 1271, 1364, 1640, 1705, 1804, 1832, 2255, 2290, 2480, 2519, 2542, 2728, 3280, 3410, 3608, 3664, 4510, 4580, 5038, 5084, 5456, 6355, 6820, 7099, 7216, 9020, 9160, 9389, 10076, 10168, 12595, 12710, 13640, 13981, 14198, 18040, 18320, 18778, 20152, 20336, 25190, 25420, 27280, 27962, 28396, 35495, 36080, 37556, 40304, 46945, 50380, 50840, 55924, 56792, 69905, 70990, 75112, 78089, 93890, 100760, 101680, 103279, 111848, 113584, 139810, 141980, 150224, 156178, 187780, 201520, 206558, 223696, 279620, 283960, 291059, 312356, 375560, 390445, 413116, 516395, 559240, 567920, 582118, 624712, 751120, 780890, 826232, 1032790, 1118480, 1164236, 1249424, 1455295, 1561780, 1652464, 2065580, 2328472, 2910590, 3123560, 3201649, 4131160, 4656944, 5821180, 6247120, 6403298, 8262320, 11642360, 12806596, 16008245, 23284720, 25613192, 32016490, 51226384, 64032980, 128065960, 256131920]

約数ペア:

[(1, 256131920), (2, 128065960), (4, 64032980), (5, 51226384), (8, 32016490), (10, 25613192), (11, 23284720), (16, 16008245), (20, 12806596), (22, 11642360), (31, 8262320), (40, 6403298), (41, 6247120), (44, 5821180), (55, 4656944), (62, 4131160), (80, 3201649), (82, 3123560), (88, 2910590), (110, 2328472), (124, 2065580), (155, 1652464), (164, 1561780), (176, 1455295), (205, 1249424), (220, 1164236), (229, 1118480), (248, 1032790), (310, 826232), (328, 780890), (341, 751120), (410, 624712), (440, 582118), (451, 567920), (458, 559240), (496, 516395), (620, 413116), (656, 390445), (682, 375560), (820, 312356), (880, 291059), (902, 283960), (916, 279620), (1145, 223696), (1240, 206558), (1271, 201520), (1364, 187780), (1640, 156178), (1705, 150224), (1804, 141980), (1832, 139810), (2255, 113584), (2290, 111848), (2480, 103279), (2519, 101680), (2542, 100760), (2728, 93890), (3280, 78089), (3410, 75112), (3608, 70990), (3664, 69905), (4510, 56792), (4580, 55924), (5038, 50840), (5084, 50380), (5456, 46945), (6355, 40304), (6820, 37556), (7099, 36080), (7216, 35495), (9020, 28396), (9160, 27962), (9389, 27280), (10076, 25420), (10168, 25190), (12595, 20336), (12710, 20152), (13640, 18778), (13981, 18320), (14198, 18040)]