19801535200

素因数分解:

$2^5\times 5^2\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{6287}}^1$

素因数の和:6465

約数の個数: 144

約数和(自身を含む): 50300780544

約数和(自身を除く): 30499245344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 80, 100, 124, 127, 155, 160, 200, 248, 254, 310, 400, 496, 508, 620, 635, 775, 800, 992, 1016, 1240, 1270, 1550, 2032, 2480, 2540, 3100, 3175, 3937, 4064, 4960, 5080, 6200, 6287, 6350, 7874, 10160, 12400, 12574, 12700, 15748, 19685, 20320, 24800, 25148, 25400, 31435, 31496, 39370, 50296, 50800, 62870, 62992, 78740, 98425, 100592, 101600, 125740, 125984, 157175, 157480, 194897, 196850, 201184, 251480, 314350, 314960, 389794, 393700, 502960, 628700, 629920, 779588, 787400, 798449, 974485, 1005920, 1257400, 1559176, 1574800, 1596898, 1948970, 2514800, 3118352, 3149600, 3193796, 3897940, 3992245, 4872425, 5029600, 6236704, 6387592, 7795880, 7984490, 9744850, 12775184, 15591760, 15968980, 19489700, 19961225, 24751919, 25550368, 31183520, 31937960, 38979400, 39922450, 49503838, 63875920, 77958800, 79844900, 99007676, 123759595, 127751840, 155917600, 159689800, 198015352, 247519190, 319379600, 396030704, 495038380, 618797975, 638759200, 792061408, 990076760, 1237595950, 1980153520, 2475191900, 3960307040, 4950383800, 9900767600, 19801535200]

約数ペア:

[(1, 19801535200), (2, 9900767600), (4, 4950383800), (5, 3960307040), (8, 2475191900), (10, 1980153520), (16, 1237595950), (20, 990076760), (25, 792061408), (31, 638759200), (32, 618797975), (40, 495038380), (50, 396030704), (62, 319379600), (80, 247519190), (100, 198015352), (124, 159689800), (127, 155917600), (155, 127751840), (160, 123759595), (200, 99007676), (248, 79844900), (254, 77958800), (310, 63875920), (400, 49503838), (496, 39922450), (508, 38979400), (620, 31937960), (635, 31183520), (775, 25550368), (800, 24751919), (992, 19961225), (1016, 19489700), (1240, 15968980), (1270, 15591760), (1550, 12775184), (2032, 9744850), (2480, 7984490), (2540, 7795880), (3100, 6387592), (3175, 6236704), (3937, 5029600), (4064, 4872425), (4960, 3992245), (5080, 3897940), (6200, 3193796), (6287, 3149600), (6350, 3118352), (7874, 2514800), (10160, 1948970), (12400, 1596898), (12574, 1574800), (12700, 1559176), (15748, 1257400), (19685, 1005920), (20320, 974485), (24800, 798449), (25148, 787400), (25400, 779588), (31435, 629920), (31496, 628700), (39370, 502960), (50296, 393700), (50800, 389794), (62870, 314960), (62992, 314350), (78740, 251480), (98425, 201184), (100592, 196850), (101600, 194897), (125740, 157480), (125984, 157175)]