20857228

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{233}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 44029440

約数和(自身を除く): 23172212

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 92, 139, 161, 233, 278, 322, 466, 556, 644, 932, 973, 1631, 1946, 3197, 3262, 3892, 5359, 6394, 6524, 10718, 12788, 21436, 22379, 32387, 37513, 44758, 64774, 75026, 89516, 129548, 150052, 226709, 453418, 744901, 906836, 1489802, 2979604, 5214307, 10428614, 20857228]

約数ペア:

[(1, 20857228), (2, 10428614), (4, 5214307), (7, 2979604), (14, 1489802), (23, 906836), (28, 744901), (46, 453418), (92, 226709), (139, 150052), (161, 129548), (233, 89516), (278, 75026), (322, 64774), (466, 44758), (556, 37513), (644, 32387), (932, 22379), (973, 21436), (1631, 12788), (1946, 10718), (3197, 6524), (3262, 6394), (3892, 5359)]