19878220

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4457}}^1$

素因数の和:4689

約数の個数: 24

約数和(自身を含む): 41940864

約数和(自身を除く): 22062644

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4457, 4460, 8914, 17828, 22285, 44570, 89140, 993911, 1987822, 3975644, 4969555, 9939110, 19878220]

約数ペア:

[(1, 19878220), (2, 9939110), (4, 4969555), (5, 3975644), (10, 1987822), (20, 993911), (223, 89140), (446, 44570), (892, 22285), (1115, 17828), (2230, 8914), (4457, 4460)]