20042000

素因数分解:

$2^4\times 5^3\times {\mathrm{11}}^1\times {\mathrm{911}}^1$

素因数の和:945

約数の個数: 80

約数和(自身を含む): 52925184

約数和(自身を除く): 32883184

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, 880, 911, 1000, 1100, 1375, 1822, 2000, 2200, 2750, 3644, 4400, 4555, 5500, 7288, 9110, 10021, 11000, 14576, 18220, 20042, 22000, 22775, 36440, 40084, 45550, 50105, 72880, 80168, 91100, 100210, 113875, 160336, 182200, 200420, 227750, 250525, 364400, 400840, 455500, 501050, 801680, 911000, 1002100, 1252625, 1822000, 2004200, 2505250, 4008400, 5010500, 10021000, 20042000]

約数ペア:

[(1, 20042000), (2, 10021000), (4, 5010500), (5, 4008400), (8, 2505250), (10, 2004200), (11, 1822000), (16, 1252625), (20, 1002100), (22, 911000), (25, 801680), (40, 501050), (44, 455500), (50, 400840), (55, 364400), (80, 250525), (88, 227750), (100, 200420), (110, 182200), (125, 160336), (176, 113875), (200, 100210), (220, 91100), (250, 80168), (275, 72880), (400, 50105), (440, 45550), (500, 40084), (550, 36440), (880, 22775), (911, 22000), (1000, 20042), (1100, 18220), (1375, 14576), (1822, 11000), (2000, 10021), (2200, 9110), (2750, 7288), (3644, 5500), (4400, 4555)]