20506948

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{479}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 45158400

約数和(自身を除く): 24651452

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 139, 154, 278, 308, 479, 556, 958, 973, 1529, 1916, 1946, 3058, 3353, 3892, 5269, 6116, 6706, 10538, 10703, 13412, 21076, 21406, 36883, 42812, 66581, 73766, 133162, 147532, 266324, 466067, 732391, 932134, 1464782, 1864268, 2929564, 5126737, 10253474, 20506948]

約数ペア:

[(1, 20506948), (2, 10253474), (4, 5126737), (7, 2929564), (11, 1864268), (14, 1464782), (22, 932134), (28, 732391), (44, 466067), (77, 266324), (139, 147532), (154, 133162), (278, 73766), (308, 66581), (479, 42812), (556, 36883), (958, 21406), (973, 21076), (1529, 13412), (1916, 10703), (1946, 10538), (3058, 6706), (3353, 6116), (3892, 5269)]