20565662404

素因数分解:

$2^2\times 7^2\times {\mathrm{163}}^1\times {\mathrm{643723}}^1$

素因数の和:643904

約数の個数: 36

約数和(自身を含む): 42122723664

約数和(自身を除く): 21557061260

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 163, 196, 326, 652, 1141, 2282, 4564, 7987, 15974, 31948, 643723, 1287446, 2574892, 4506061, 9012122, 18024244, 31542427, 63084854, 104926849, 126169708, 209853698, 419707396, 734487943, 1468975886, 2937951772, 5141415601, 10282831202, 20565662404]

約数ペア:

[(1, 20565662404), (2, 10282831202), (4, 5141415601), (7, 2937951772), (14, 1468975886), (28, 734487943), (49, 419707396), (98, 209853698), (163, 126169708), (196, 104926849), (326, 63084854), (652, 31542427), (1141, 18024244), (2282, 9012122), (4564, 4506061), (7987, 2574892), (15974, 1287446), (31948, 643723)]