12900000

素因数分解:

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

素因数の和:81

約数の個数: 144

約数和(自身を含む): 43309728

約数和(自身を除く): 30409728

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 32, 40, 43, 48, 50, 60, 75, 80, 86, 96, 100, 120, 125, 129, 150, 160, 172, 200, 215, 240, 250, 258, 300, 344, 375, 400, 430, 480, 500, 516, 600, 625, 645, 688, 750, 800, 860, 1000, 1032, 1075, 1200, 1250, 1290, 1376, 1500, 1720, 1875, 2000, 2064, 2150, 2400, 2500, 2580, 3000, 3125, 3225, 3440, 3750, 4000, 4128, 4300, 5000, 5160, 5375, 6000, 6250, 6450, 6880, 7500, 8600, 9375, 10000, 10320, 10750, 12000, 12500, 12900, 15000, 16125, 17200, 18750, 20000, 20640, 21500, 25000, 25800, 26875, 30000, 32250, 34400, 37500, 43000, 50000, 51600, 53750, 60000, 64500, 75000, 80625, 86000, 100000, 103200, 107500, 129000, 134375, 150000, 161250, 172000, 215000, 258000, 268750, 300000, 322500, 403125, 430000, 516000, 537500, 645000, 806250, 860000, 1075000, 1290000, 1612500, 2150000, 2580000, 3225000, 4300000, 6450000, 12900000]

約数ペア:

[(1, 12900000), (2, 6450000), (3, 4300000), (4, 3225000), (5, 2580000), (6, 2150000), (8, 1612500), (10, 1290000), (12, 1075000), (15, 860000), (16, 806250), (20, 645000), (24, 537500), (25, 516000), (30, 430000), (32, 403125), (40, 322500), (43, 300000), (48, 268750), (50, 258000), (60, 215000), (75, 172000), (80, 161250), (86, 150000), (96, 134375), (100, 129000), (120, 107500), (125, 103200), (129, 100000), (150, 86000), (160, 80625), (172, 75000), (200, 64500), (215, 60000), (240, 53750), (250, 51600), (258, 50000), (300, 43000), (344, 37500), (375, 34400), (400, 32250), (430, 30000), (480, 26875), (500, 25800), (516, 25000), (600, 21500), (625, 20640), (645, 20000), (688, 18750), (750, 17200), (800, 16125), (860, 15000), (1000, 12900), (1032, 12500), (1075, 12000), (1200, 10750), (1250, 10320), (1290, 10000), (1376, 9375), (1500, 8600), (1720, 7500), (1875, 6880), (2000, 6450), (2064, 6250), (2150, 6000), (2400, 5375), (2500, 5160), (2580, 5000), (3000, 4300), (3125, 4128), (3225, 4000), (3440, 3750)]