550000

素因数分解:

$2^4\times 5^5\times {\mathrm{11}}^1$

素因数の和:44

約数の個数: 60

約数和(自身を含む): 1453032

約数和(自身を除く): 903032

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 80, 88, 100, 110, 125, 176, 200, 220, 250, 275, 400, 440, 500, 550, 625, 880, 1000, 1100, 1250, 1375, 2000, 2200, 2500, 2750, 3125, 4400, 5000, 5500, 6250, 6875, 10000, 11000, 12500, 13750, 22000, 25000, 27500, 34375, 50000, 55000, 68750, 110000, 137500, 275000, 550000]

約数ペア:

[(1, 550000), (2, 275000), (4, 137500), (5, 110000), (8, 68750), (10, 55000), (11, 50000), (16, 34375), (20, 27500), (22, 25000), (25, 22000), (40, 13750), (44, 12500), (50, 11000), (55, 10000), (80, 6875), (88, 6250), (100, 5500), (110, 5000), (125, 4400), (176, 3125), (200, 2750), (220, 2500), (250, 2200), (275, 2000), (400, 1375), (440, 1250), (500, 1100), (550, 1000), (625, 880)]