20101780

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9221}}^1$

素因数の和:9339

約数の個数: 24

約数和(自身を含む): 42605640

約数和(自身を除く): 22503860

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9221, 18442, 36884, 46105, 92210, 184420, 1005089, 2010178, 4020356, 5025445, 10050890, 20101780]

約数ペア:

[(1, 20101780), (2, 10050890), (4, 5025445), (5, 4020356), (10, 2010178), (20, 1005089), (109, 184420), (218, 92210), (436, 46105), (545, 36884), (1090, 18442), (2180, 9221)]