20778140

素因数分解:

$2^2\times 5^1\times {\mathrm{167}}^1\times {\mathrm{6221}}^1$

素因数の和:6397

約数の個数: 24

約数和(自身を含む): 43902432

約数和(自身を除く): 23124292

約数列:

[1, 2, 4, 5, 10, 20, 167, 334, 668, 835, 1670, 3340, 6221, 12442, 24884, 31105, 62210, 124420, 1038907, 2077814, 4155628, 5194535, 10389070, 20778140]

約数ペア:

[(1, 20778140), (2, 10389070), (4, 5194535), (5, 4155628), (10, 2077814), (20, 1038907), (167, 124420), (334, 62210), (668, 31105), (835, 24884), (1670, 12442), (3340, 6221)]