20640000

素因数分解:

$2^8\times 3^1\times 5^4\times {\mathrm{43}}^1$

素因数の和:82

約数の個数: 180

約数和(自身を含む): 70240016

約数和(自身を除く): 49600016

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 32, 40, 43, 48, 50, 60, 64, 75, 80, 86, 96, 100, 120, 125, 128, 129, 150, 160, 172, 192, 200, 215, 240, 250, 256, 258, 300, 320, 344, 375, 384, 400, 430, 480, 500, 516, 600, 625, 640, 645, 688, 750, 768, 800, 860, 960, 1000, 1032, 1075, 1200, 1250, 1280, 1290, 1376, 1500, 1600, 1720, 1875, 1920, 2000, 2064, 2150, 2400, 2500, 2580, 2752, 3000, 3200, 3225, 3440, 3750, 3840, 4000, 4128, 4300, 4800, 5000, 5160, 5375, 5504, 6000, 6400, 6450, 6880, 7500, 8000, 8256, 8600, 9600, 10000, 10320, 10750, 11008, 12000, 12900, 13760, 15000, 16000, 16125, 16512, 17200, 19200, 20000, 20640, 21500, 24000, 25800, 26875, 27520, 30000, 32000, 32250, 33024, 34400, 40000, 41280, 43000, 48000, 51600, 53750, 55040, 60000, 64500, 68800, 80000, 80625, 82560, 86000, 96000, 103200, 107500, 120000, 129000, 137600, 160000, 161250, 165120, 172000, 206400, 215000, 240000, 258000, 275200, 322500, 344000, 412800, 430000, 480000, 516000, 645000, 688000, 825600, 860000, 1032000, 1290000, 1376000, 1720000, 2064000, 2580000, 3440000, 4128000, 5160000, 6880000, 10320000, 20640000]

約数ペア:

[(1, 20640000), (2, 10320000), (3, 6880000), (4, 5160000), (5, 4128000), (6, 3440000), (8, 2580000), (10, 2064000), (12, 1720000), (15, 1376000), (16, 1290000), (20, 1032000), (24, 860000), (25, 825600), (30, 688000), (32, 645000), (40, 516000), (43, 480000), (48, 430000), (50, 412800), (60, 344000), (64, 322500), (75, 275200), (80, 258000), (86, 240000), (96, 215000), (100, 206400), (120, 172000), (125, 165120), (128, 161250), (129, 160000), (150, 137600), (160, 129000), (172, 120000), (192, 107500), (200, 103200), (215, 96000), (240, 86000), (250, 82560), (256, 80625), (258, 80000), (300, 68800), (320, 64500), (344, 60000), (375, 55040), (384, 53750), (400, 51600), (430, 48000), (480, 43000), (500, 41280), (516, 40000), (600, 34400), (625, 33024), (640, 32250), (645, 32000), (688, 30000), (750, 27520), (768, 26875), (800, 25800), (860, 24000), (960, 21500), (1000, 20640), (1032, 20000), (1075, 19200), (1200, 17200), (1250, 16512), (1280, 16125), (1290, 16000), (1376, 15000), (1500, 13760), (1600, 12900), (1720, 12000), (1875, 11008), (1920, 10750), (2000, 10320), (2064, 10000), (2150, 9600), (2400, 8600), (2500, 8256), (2580, 8000), (2752, 7500), (3000, 6880), (3200, 6450), (3225, 6400), (3440, 6000), (3750, 5504), (3840, 5375), (4000, 5160), (4128, 5000), (4300, 4800)]