19996540

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{7193}}^1$

素因数の和:7341

約数の個数: 24

約数和(自身を含む): 42300720

約数和(自身を除く): 22304180

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 7193, 14386, 28772, 35965, 71930, 143860, 999827, 1999654, 3999308, 4999135, 9998270, 19996540]

約数ペア:

[(1, 19996540), (2, 9998270), (4, 4999135), (5, 3999308), (10, 1999654), (20, 999827), (139, 143860), (278, 71930), (556, 35965), (695, 28772), (1390, 14386), (2780, 7193)]