20280000

素因数分解:

$2^6\times 3^1\times 5^4\times {\mathrm{13}}^2$

素因数の和:61

約数の個数: 210

約数和(自身を含む): 72604884

約数和(自身を除く): 52324884

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, 64, 65, 75, 78, 80, 96, 100, 104, 120, 125, 130, 150, 156, 160, 169, 192, 195, 200, 208, 240, 250, 260, 300, 312, 320, 325, 338, 375, 390, 400, 416, 480, 500, 507, 520, 600, 624, 625, 650, 676, 750, 780, 800, 832, 845, 960, 975, 1000, 1014, 1040, 1200, 1248, 1250, 1300, 1352, 1500, 1560, 1600, 1625, 1690, 1875, 1950, 2000, 2028, 2080, 2400, 2496, 2500, 2535, 2600, 2704, 3000, 3120, 3250, 3380, 3750, 3900, 4000, 4056, 4160, 4225, 4800, 4875, 5000, 5070, 5200, 5408, 6000, 6240, 6500, 6760, 7500, 7800, 8000, 8112, 8125, 8450, 9750, 10000, 10140, 10400, 10816, 12000, 12480, 12675, 13000, 13520, 15000, 15600, 16224, 16250, 16900, 19500, 20000, 20280, 20800, 21125, 24000, 24375, 25350, 26000, 27040, 30000, 31200, 32448, 32500, 33800, 39000, 40000, 40560, 42250, 48750, 50700, 52000, 54080, 60000, 62400, 63375, 65000, 67600, 78000, 81120, 84500, 97500, 101400, 104000, 105625, 120000, 126750, 130000, 135200, 156000, 162240, 169000, 195000, 202800, 211250, 253500, 260000, 270400, 312000, 316875, 338000, 390000, 405600, 422500, 507000, 520000, 633750, 676000, 780000, 811200, 845000, 1014000, 1267500, 1352000, 1560000, 1690000, 2028000, 2535000, 3380000, 4056000, 5070000, 6760000, 10140000, 20280000]

約数ペア:

[(1, 20280000), (2, 10140000), (3, 6760000), (4, 5070000), (5, 4056000), (6, 3380000), (8, 2535000), (10, 2028000), (12, 1690000), (13, 1560000), (15, 1352000), (16, 1267500), (20, 1014000), (24, 845000), (25, 811200), (26, 780000), (30, 676000), (32, 633750), (39, 520000), (40, 507000), (48, 422500), (50, 405600), (52, 390000), (60, 338000), (64, 316875), (65, 312000), (75, 270400), (78, 260000), (80, 253500), (96, 211250), (100, 202800), (104, 195000), (120, 169000), (125, 162240), (130, 156000), (150, 135200), (156, 130000), (160, 126750), (169, 120000), (192, 105625), (195, 104000), (200, 101400), (208, 97500), (240, 84500), (250, 81120), (260, 78000), (300, 67600), (312, 65000), (320, 63375), (325, 62400), (338, 60000), (375, 54080), (390, 52000), (400, 50700), (416, 48750), (480, 42250), (500, 40560), (507, 40000), (520, 39000), (600, 33800), (624, 32500), (625, 32448), (650, 31200), (676, 30000), (750, 27040), (780, 26000), (800, 25350), (832, 24375), (845, 24000), (960, 21125), (975, 20800), (1000, 20280), (1014, 20000), (1040, 19500), (1200, 16900), (1248, 16250), (1250, 16224), (1300, 15600), (1352, 15000), (1500, 13520), (1560, 13000), (1600, 12675), (1625, 12480), (1690, 12000), (1875, 10816), (1950, 10400), (2000, 10140), (2028, 10000), (2080, 9750), (2400, 8450), (2496, 8125), (2500, 8112), (2535, 8000), (2600, 7800), (2704, 7500), (3000, 6760), (3120, 6500), (3250, 6240), (3380, 6000), (3750, 5408), (3900, 5200), (4000, 5070), (4056, 5000), (4160, 4875), (4225, 4800)]