18917900

素因数分解:

$2^2\times 5^2\times {\mathrm{139}}^1\times {\mathrm{1361}}^1$

素因数の和:1514

約数の個数: 36

約数和(自身を含む): 41377560

約数和(自身を除く): 22459660

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 139, 278, 556, 695, 1361, 1390, 2722, 2780, 3475, 5444, 6805, 6950, 13610, 13900, 27220, 34025, 68050, 136100, 189179, 378358, 756716, 945895, 1891790, 3783580, 4729475, 9458950, 18917900]

約数ペア:

[(1, 18917900), (2, 9458950), (4, 4729475), (5, 3783580), (10, 1891790), (20, 945895), (25, 756716), (50, 378358), (100, 189179), (139, 136100), (278, 68050), (556, 34025), (695, 27220), (1361, 13900), (1390, 13610), (2722, 6950), (2780, 6805), (3475, 5444)]