20477756

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{1999}}^1$

素因数の和:2213

約数の個数: 24

約数和(自身を含む): 38808000

約数和(自身を除く): 18330244

約数列:

[1, 2, 4, 13, 26, 52, 197, 394, 788, 1999, 2561, 3998, 5122, 7996, 10244, 25987, 51974, 103948, 393803, 787606, 1575212, 5119439, 10238878, 20477756]

約数ペア:

[(1, 20477756), (2, 10238878), (4, 5119439), (13, 1575212), (26, 787606), (52, 393803), (197, 103948), (394, 51974), (788, 25987), (1999, 10244), (2561, 7996), (3998, 5122)]