640380000

素因数分解:

$2^5\times 3^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{821}}^1$

素因数の和:867

約数の個数: 240

約数和(自身を含む): 2264912496

約数和(自身を除く): 1624532496

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 25, 26, 30, 32, 39, 40, 48, 50, 52, 60, 65, 75, 78, 80, 96, 100, 104, 120, 125, 130, 150, 156, 160, 195, 200, 208, 240, 250, 260, 300, 312, 325, 375, 390, 400, 416, 480, 500, 520, 600, 624, 625, 650, 750, 780, 800, 821, 975, 1000, 1040, 1200, 1248, 1250, 1300, 1500, 1560, 1625, 1642, 1875, 1950, 2000, 2080, 2400, 2463, 2500, 2600, 3000, 3120, 3250, 3284, 3750, 3900, 4000, 4105, 4875, 4926, 5000, 5200, 6000, 6240, 6500, 6568, 7500, 7800, 8125, 8210, 9750, 9852, 10000, 10400, 10673, 12000, 12315, 13000, 13136, 15000, 15600, 16250, 16420, 19500, 19704, 20000, 20525, 21346, 24375, 24630, 26000, 26272, 30000, 31200, 32019, 32500, 32840, 39000, 39408, 41050, 42692, 48750, 49260, 52000, 53365, 60000, 61575, 64038, 65000, 65680, 78000, 78816, 82100, 85384, 97500, 98520, 102625, 106730, 123150, 128076, 130000, 131360, 156000, 160095, 164200, 170768, 195000, 197040, 205250, 213460, 246300, 256152, 260000, 266825, 307875, 320190, 328400, 341536, 390000, 394080, 410500, 426920, 492600, 512304, 513125, 533650, 615750, 640380, 656800, 780000, 800475, 821000, 853840, 985200, 1024608, 1026250, 1067300, 1231500, 1280760, 1334125, 1539375, 1600950, 1642000, 1707680, 1970400, 2052500, 2134600, 2463000, 2561520, 2668250, 3078750, 3201900, 3284000, 4002375, 4105000, 4269200, 4926000, 5123040, 5336500, 6157500, 6403800, 6670625, 8004750, 8210000, 8538400, 9852000, 10673000, 12315000, 12807600, 13341250, 16009500, 16420000, 20011875, 21346000, 24630000, 25615200, 26682500, 32019000, 40023750, 42692000, 49260000, 53365000, 64038000, 80047500, 106730000, 128076000, 160095000, 213460000, 320190000, 640380000]

約数ペア:

[(1, 640380000), (2, 320190000), (3, 213460000), (4, 160095000), (5, 128076000), (6, 106730000), (8, 80047500), (10, 64038000), (12, 53365000), (13, 49260000), (15, 42692000), (16, 40023750), (20, 32019000), (24, 26682500), (25, 25615200), (26, 24630000), (30, 21346000), (32, 20011875), (39, 16420000), (40, 16009500), (48, 13341250), (50, 12807600), (52, 12315000), (60, 10673000), (65, 9852000), (75, 8538400), (78, 8210000), (80, 8004750), (96, 6670625), (100, 6403800), (104, 6157500), (120, 5336500), (125, 5123040), (130, 4926000), (150, 4269200), (156, 4105000), (160, 4002375), (195, 3284000), (200, 3201900), (208, 3078750), (240, 2668250), (250, 2561520), (260, 2463000), (300, 2134600), (312, 2052500), (325, 1970400), (375, 1707680), (390, 1642000), (400, 1600950), (416, 1539375), (480, 1334125), (500, 1280760), (520, 1231500), (600, 1067300), (624, 1026250), (625, 1024608), (650, 985200), (750, 853840), (780, 821000), (800, 800475), (821, 780000), (975, 656800), (1000, 640380), (1040, 615750), (1200, 533650), (1248, 513125), (1250, 512304), (1300, 492600), (1500, 426920), (1560, 410500), (1625, 394080), (1642, 390000), (1875, 341536), (1950, 328400), (2000, 320190), (2080, 307875), (2400, 266825), (2463, 260000), (2500, 256152), (2600, 246300), (3000, 213460), (3120, 205250), (3250, 197040), (3284, 195000), (3750, 170768), (3900, 164200), (4000, 160095), (4105, 156000), (4875, 131360), (4926, 130000), (5000, 128076), (5200, 123150), (6000, 106730), (6240, 102625), (6500, 98520), (6568, 97500), (7500, 85384), (7800, 82100), (8125, 78816), (8210, 78000), (9750, 65680), (9852, 65000), (10000, 64038), (10400, 61575), (10673, 60000), (12000, 53365), (12315, 52000), (13000, 49260), (13136, 48750), (15000, 42692), (15600, 41050), (16250, 39408), (16420, 39000), (19500, 32840), (19704, 32500), (20000, 32019), (20525, 31200), (21346, 30000), (24375, 26272), (24630, 26000)]