18220000

素因数分解:

$2^5\times 5^4\times {\mathrm{911}}^1$

素因数の和:941

約数の個数: 60

約数和(自身を含む): 44873136

約数和(自身を除く): 26653136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 911, 1000, 1250, 1822, 2000, 2500, 3644, 4000, 4555, 5000, 7288, 9110, 10000, 14576, 18220, 20000, 22775, 29152, 36440, 45550, 72880, 91100, 113875, 145760, 182200, 227750, 364400, 455500, 569375, 728800, 911000, 1138750, 1822000, 2277500, 3644000, 4555000, 9110000, 18220000]

約数ペア:

[(1, 18220000), (2, 9110000), (4, 4555000), (5, 3644000), (8, 2277500), (10, 1822000), (16, 1138750), (20, 911000), (25, 728800), (32, 569375), (40, 455500), (50, 364400), (80, 227750), (100, 182200), (125, 145760), (160, 113875), (200, 91100), (250, 72880), (400, 45550), (500, 36440), (625, 29152), (800, 22775), (911, 20000), (1000, 18220), (1250, 14576), (1822, 10000), (2000, 9110), (2500, 7288), (3644, 5000), (4000, 4555)]