31812020

素因数分解:

$2^2\times 5^1\times {\mathrm{409}}^1\times {\mathrm{3889}}^1$

素因数の和:4307

約数の個数: 24

約数和(自身を含む): 66985800

約数和(自身を除く): 35173780

約数列:

[1, 2, 4, 5, 10, 20, 409, 818, 1636, 2045, 3889, 4090, 7778, 8180, 15556, 19445, 38890, 77780, 1590601, 3181202, 6362404, 7953005, 15906010, 31812020]

約数ペア:

[(1, 31812020), (2, 15906010), (4, 7953005), (5, 6362404), (10, 3181202), (20, 1590601), (409, 77780), (818, 38890), (1636, 19445), (2045, 15556), (3889, 8180), (4090, 7778)]