19401800

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{8819}}^1$

素因数の和:8846

約数の個数: 48

約数和(自身を含む): 49215600

約数和(自身を除く): 29813800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 200, 220, 275, 440, 550, 1100, 2200, 8819, 17638, 35276, 44095, 70552, 88190, 97009, 176380, 194018, 220475, 352760, 388036, 440950, 485045, 776072, 881900, 970090, 1763800, 1940180, 2425225, 3880360, 4850450, 9700900, 19401800]

約数ペア:

[(1, 19401800), (2, 9700900), (4, 4850450), (5, 3880360), (8, 2425225), (10, 1940180), (11, 1763800), (20, 970090), (22, 881900), (25, 776072), (40, 485045), (44, 440950), (50, 388036), (55, 352760), (88, 220475), (100, 194018), (110, 176380), (200, 97009), (220, 88190), (275, 70552), (440, 44095), (550, 35276), (1100, 17638), (2200, 8819)]