20018560000

素因数分解:

$2^{10}\times 5^4\times {\mathrm{31}}^1\times {\mathrm{1009}}^1$

素因数の和:1080

約数の個数: 220

約数和(自身を含む): 51670210240

約数和(自身を除く): 31651650240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 64, 80, 100, 124, 125, 128, 155, 160, 200, 248, 250, 256, 310, 320, 400, 496, 500, 512, 620, 625, 640, 775, 800, 992, 1000, 1009, 1024, 1240, 1250, 1280, 1550, 1600, 1984, 2000, 2018, 2480, 2500, 2560, 3100, 3200, 3875, 3968, 4000, 4036, 4960, 5000, 5045, 5120, 6200, 6400, 7750, 7936, 8000, 8072, 9920, 10000, 10090, 12400, 12800, 15500, 15872, 16000, 16144, 19375, 19840, 20000, 20180, 24800, 25225, 25600, 31000, 31279, 31744, 32000, 32288, 38750, 39680, 40000, 40360, 49600, 50450, 62000, 62558, 64000, 64576, 77500, 79360, 80000, 80720, 99200, 100900, 124000, 125116, 126125, 128000, 129152, 155000, 156395, 158720, 160000, 161440, 198400, 201800, 248000, 250232, 252250, 258304, 310000, 312790, 320000, 322880, 396800, 403600, 496000, 500464, 504500, 516608, 620000, 625580, 630625, 640000, 645760, 781975, 793600, 807200, 992000, 1000928, 1009000, 1033216, 1240000, 1251160, 1261250, 1291520, 1563950, 1614400, 1984000, 2001856, 2018000, 2480000, 2502320, 2522500, 2583040, 3127900, 3228800, 3909875, 3968000, 4003712, 4036000, 4960000, 5004640, 5045000, 5166080, 6255800, 6457600, 7819750, 8007424, 8072000, 9920000, 10009280, 10090000, 12511600, 12915200, 15639500, 16014848, 16144000, 19549375, 19840000, 20018560, 20180000, 25023200, 25830400, 31279000, 32029696, 32288000, 39098750, 40037120, 40360000, 50046400, 62558000, 64576000, 78197500, 80074240, 80720000, 100092800, 125116000, 129152000, 156395000, 160148480, 161440000, 200185600, 250232000, 312790000, 322880000, 400371200, 500464000, 625580000, 645760000, 800742400, 1000928000, 1251160000, 2001856000, 2502320000, 4003712000, 5004640000, 10009280000, 20018560000]

約数ペア:

[(1, 20018560000), (2, 10009280000), (4, 5004640000), (5, 4003712000), (8, 2502320000), (10, 2001856000), (16, 1251160000), (20, 1000928000), (25, 800742400), (31, 645760000), (32, 625580000), (40, 500464000), (50, 400371200), (62, 322880000), (64, 312790000), (80, 250232000), (100, 200185600), (124, 161440000), (125, 160148480), (128, 156395000), (155, 129152000), (160, 125116000), (200, 100092800), (248, 80720000), (250, 80074240), (256, 78197500), (310, 64576000), (320, 62558000), (400, 50046400), (496, 40360000), (500, 40037120), (512, 39098750), (620, 32288000), (625, 32029696), (640, 31279000), (775, 25830400), (800, 25023200), (992, 20180000), (1000, 20018560), (1009, 19840000), (1024, 19549375), (1240, 16144000), (1250, 16014848), (1280, 15639500), (1550, 12915200), (1600, 12511600), (1984, 10090000), (2000, 10009280), (2018, 9920000), (2480, 8072000), (2500, 8007424), (2560, 7819750), (3100, 6457600), (3200, 6255800), (3875, 5166080), (3968, 5045000), (4000, 5004640), (4036, 4960000), (4960, 4036000), (5000, 4003712), (5045, 3968000), (5120, 3909875), (6200, 3228800), (6400, 3127900), (7750, 2583040), (7936, 2522500), (8000, 2502320), (8072, 2480000), (9920, 2018000), (10000, 2001856), (10090, 1984000), (12400, 1614400), (12800, 1563950), (15500, 1291520), (15872, 1261250), (16000, 1251160), (16144, 1240000), (19375, 1033216), (19840, 1009000), (20000, 1000928), (20180, 992000), (24800, 807200), (25225, 793600), (25600, 781975), (31000, 645760), (31279, 640000), (31744, 630625), (32000, 625580), (32288, 620000), (38750, 516608), (39680, 504500), (40000, 500464), (40360, 496000), (49600, 403600), (50450, 396800), (62000, 322880), (62558, 320000), (64000, 312790), (64576, 310000), (77500, 258304), (79360, 252250), (80000, 250232), (80720, 248000), (99200, 201800), (100900, 198400), (124000, 161440), (125116, 160000), (126125, 158720), (128000, 156395), (129152, 155000)]