20802100

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{18911}}^1$

素因数の和:18936

約数の個数: 36

約数和(自身を含む): 49246848

約数和(自身を除く): 28444748

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 220, 275, 550, 1100, 18911, 37822, 75644, 94555, 189110, 208021, 378220, 416042, 472775, 832084, 945550, 1040105, 1891100, 2080210, 4160420, 5200525, 10401050, 20802100]

約数ペア:

[(1, 20802100), (2, 10401050), (4, 5200525), (5, 4160420), (10, 2080210), (11, 1891100), (20, 1040105), (22, 945550), (25, 832084), (44, 472775), (50, 416042), (55, 378220), (100, 208021), (110, 189110), (220, 94555), (275, 75644), (550, 37822), (1100, 18911)]