20851700

素因数分解:

$2^2\times 5^2\times {\mathrm{109}}^1\times {\mathrm{1913}}^1$

素因数の和:2036

約数の個数: 36

約数和(自身を含む): 45687180

約数和(自身を除く): 24835480

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 109, 218, 436, 545, 1090, 1913, 2180, 2725, 3826, 5450, 7652, 9565, 10900, 19130, 38260, 47825, 95650, 191300, 208517, 417034, 834068, 1042585, 2085170, 4170340, 5212925, 10425850, 20851700]

約数ペア:

[(1, 20851700), (2, 10425850), (4, 5212925), (5, 4170340), (10, 2085170), (20, 1042585), (25, 834068), (50, 417034), (100, 208517), (109, 191300), (218, 95650), (436, 47825), (545, 38260), (1090, 19130), (1913, 10900), (2180, 9565), (2725, 7652), (3826, 5450)]