21000906416

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^2\times {\mathrm{519413}}^1$

素因数の和:519466

約数の個数: 60

約数和(自身を含む): 49078390032

約数和(自身を除く): 28077483616

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 361, 532, 722, 1064, 1444, 2128, 2527, 2888, 5054, 5776, 10108, 20216, 40432, 519413, 1038826, 2077652, 3635891, 4155304, 7271782, 8310608, 9868847, 14543564, 19737694, 29087128, 39475388, 58174256, 69081929, 78950776, 138163858, 157901552, 187508093, 276327716, 375016186, 552655432, 750032372, 1105310864, 1312556651, 1500064744, 2625113302, 3000129488, 5250226604, 10500453208, 21000906416]

約数ペア:

[(1, 21000906416), (2, 10500453208), (4, 5250226604), (7, 3000129488), (8, 2625113302), (14, 1500064744), (16, 1312556651), (19, 1105310864), (28, 750032372), (38, 552655432), (56, 375016186), (76, 276327716), (112, 187508093), (133, 157901552), (152, 138163858), (266, 78950776), (304, 69081929), (361, 58174256), (532, 39475388), (722, 29087128), (1064, 19737694), (1444, 14543564), (2128, 9868847), (2527, 8310608), (2888, 7271782), (5054, 4155304), (5776, 3635891), (10108, 2077652), (20216, 1038826), (40432, 519413)]