21308900

素因数分解:

$2^2\times 5^2\times {\mathrm{409}}^1\times {\mathrm{521}}^1$

素因数の和:944

約数の個数: 36

約数和(自身を含む): 46442340

約数和(自身を除く): 25133440

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 409, 521, 818, 1042, 1636, 2045, 2084, 2605, 4090, 5210, 8180, 10225, 10420, 13025, 20450, 26050, 40900, 52100, 213089, 426178, 852356, 1065445, 2130890, 4261780, 5327225, 10654450, 21308900]

約数ペア:

[(1, 21308900), (2, 10654450), (4, 5327225), (5, 4261780), (10, 2130890), (20, 1065445), (25, 852356), (50, 426178), (100, 213089), (409, 52100), (521, 40900), (818, 26050), (1042, 20450), (1636, 13025), (2045, 10420), (2084, 10225), (2605, 8180), (4090, 5210)]