19818620

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7129}}^1$

素因数の和:7277

約数の個数: 24

約数和(自身を含む): 41924400

約数和(自身を除く): 22105780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7129, 14258, 28516, 35645, 71290, 142580, 990931, 1981862, 3963724, 4954655, 9909310, 19818620]

約数ペア:

[(1, 19818620), (2, 9909310), (4, 4954655), (5, 3963724), (10, 1981862), (20, 990931), (139, 142580), (278, 71290), (556, 35645), (695, 28516), (1390, 14258), (2780, 7129)]