860000

素因数分解:

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

素因数の和:73

約数の個数: 60

約数和(自身を含む): 2164932

約数和(自身を除く): 1304932

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 43, 50, 80, 86, 100, 125, 160, 172, 200, 215, 250, 344, 400, 430, 500, 625, 688, 800, 860, 1000, 1075, 1250, 1376, 1720, 2000, 2150, 2500, 3440, 4000, 4300, 5000, 5375, 6880, 8600, 10000, 10750, 17200, 20000, 21500, 26875, 34400, 43000, 53750, 86000, 107500, 172000, 215000, 430000, 860000]

約数ペア:

[(1, 860000), (2, 430000), (4, 215000), (5, 172000), (8, 107500), (10, 86000), (16, 53750), (20, 43000), (25, 34400), (32, 26875), (40, 21500), (43, 20000), (50, 17200), (80, 10750), (86, 10000), (100, 8600), (125, 6880), (160, 5375), (172, 5000), (200, 4300), (215, 4000), (250, 3440), (344, 2500), (400, 2150), (430, 2000), (500, 1720), (625, 1376), (688, 1250), (800, 1075), (860, 1000)]