645000

素因数分解:

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

素因数の和:72

約数の個数: 80

約数和(自身を含む): 2061840

約数和(自身を除く): 1416840

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 25, 30, 40, 43, 50, 60, 75, 86, 100, 120, 125, 129, 150, 172, 200, 215, 250, 258, 300, 344, 375, 430, 500, 516, 600, 625, 645, 750, 860, 1000, 1032, 1075, 1250, 1290, 1500, 1720, 1875, 2150, 2500, 2580, 3000, 3225, 3750, 4300, 5000, 5160, 5375, 6450, 7500, 8600, 10750, 12900, 15000, 16125, 21500, 25800, 26875, 32250, 43000, 53750, 64500, 80625, 107500, 129000, 161250, 215000, 322500, 645000]

約数ペア:

[(1, 645000), (2, 322500), (3, 215000), (4, 161250), (5, 129000), (6, 107500), (8, 80625), (10, 64500), (12, 53750), (15, 43000), (20, 32250), (24, 26875), (25, 25800), (30, 21500), (40, 16125), (43, 15000), (50, 12900), (60, 10750), (75, 8600), (86, 7500), (100, 6450), (120, 5375), (125, 5160), (129, 5000), (150, 4300), (172, 3750), (200, 3225), (215, 3000), (250, 2580), (258, 2500), (300, 2150), (344, 1875), (375, 1720), (430, 1500), (500, 1290), (516, 1250), (600, 1075), (625, 1032), (645, 1000), (750, 860)]