2150000

素因数分解:

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

素因数の和:76

約数の個数: 60

約数和(自身を含む): 5327784

約数和(自身を除く): 3177784

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 43, 50, 80, 86, 100, 125, 172, 200, 215, 250, 344, 400, 430, 500, 625, 688, 860, 1000, 1075, 1250, 1720, 2000, 2150, 2500, 3125, 3440, 4300, 5000, 5375, 6250, 8600, 10000, 10750, 12500, 17200, 21500, 25000, 26875, 43000, 50000, 53750, 86000, 107500, 134375, 215000, 268750, 430000, 537500, 1075000, 2150000]

約数ペア:

[(1, 2150000), (2, 1075000), (4, 537500), (5, 430000), (8, 268750), (10, 215000), (16, 134375), (20, 107500), (25, 86000), (40, 53750), (43, 50000), (50, 43000), (80, 26875), (86, 25000), (100, 21500), (125, 17200), (172, 12500), (200, 10750), (215, 10000), (250, 8600), (344, 6250), (400, 5375), (430, 5000), (500, 4300), (625, 3440), (688, 3125), (860, 2500), (1000, 2150), (1075, 2000), (1250, 1720)]