19729820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89681}}^1$

素因数の和:89701

約数の個数: 24

約数和(自身を含む): 45199728

約数和(自身を除く): 25469908

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 89681, 179362, 358724, 448405, 896810, 986491, 1793620, 1972982, 3945964, 4932455, 9864910, 19729820]

約数ペア:

[(1, 19729820), (2, 9864910), (4, 4932455), (5, 3945964), (10, 1972982), (11, 1793620), (20, 986491), (22, 896810), (44, 448405), (55, 358724), (110, 179362), (220, 89681)]