28638841

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:301

約数の個数: 32

約数和(自身を含む): 37859328

約数和(自身を除く): 9220487

約数列:

[1, 7, 11, 23, 77, 103, 157, 161, 253, 721, 1099, 1133, 1727, 1771, 2369, 3611, 7931, 12089, 16171, 16583, 25277, 26059, 39721, 113197, 177881, 182413, 278047, 371933, 1245167, 2603531, 4091263, 28638841]

約数ペア:

[(1, 28638841), (7, 4091263), (11, 2603531), (23, 1245167), (77, 371933), (103, 278047), (157, 182413), (161, 177881), (253, 113197), (721, 39721), (1099, 26059), (1133, 25277), (1727, 16583), (1771, 16171), (2369, 12089), (3611, 7931)]