20081900

素因数分解:

$2^2\times 5^2\times {\mathrm{409}}^1\times {\mathrm{491}}^1$

素因数の和:914

約数の個数: 36

約数和(自身を含む): 43773240

約数和(自身を除く): 23691340

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 409, 491, 818, 982, 1636, 1964, 2045, 2455, 4090, 4910, 8180, 9820, 10225, 12275, 20450, 24550, 40900, 49100, 200819, 401638, 803276, 1004095, 2008190, 4016380, 5020475, 10040950, 20081900]

約数ペア:

[(1, 20081900), (2, 10040950), (4, 5020475), (5, 4016380), (10, 2008190), (20, 1004095), (25, 803276), (50, 401638), (100, 200819), (409, 49100), (491, 40900), (818, 24550), (982, 20450), (1636, 12275), (1964, 10225), (2045, 9820), (2455, 8180), (4090, 4910)]