20779892

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{163}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 43532160

約数和(自身を除く): 22752268

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 116, 157, 163, 203, 314, 326, 406, 628, 652, 812, 1099, 1141, 2198, 2282, 4396, 4553, 4564, 4727, 9106, 9454, 18212, 18908, 25591, 31871, 33089, 51182, 63742, 66178, 102364, 127484, 132356, 179137, 358274, 716548, 742139, 1484278, 2968556, 5194973, 10389946, 20779892]

約数ペア:

[(1, 20779892), (2, 10389946), (4, 5194973), (7, 2968556), (14, 1484278), (28, 742139), (29, 716548), (58, 358274), (116, 179137), (157, 132356), (163, 127484), (203, 102364), (314, 66178), (326, 63742), (406, 51182), (628, 33089), (652, 31871), (812, 25591), (1099, 18908), (1141, 18212), (2198, 9454), (2282, 9106), (4396, 4727), (4553, 4564)]