28457780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109453}}^1$

素因数の和:109475

約数の個数: 24

約数和(自身を含む): 64358952

約数和(自身を除く): 35901172

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 109453, 218906, 437812, 547265, 1094530, 1422889, 2189060, 2845778, 5691556, 7114445, 14228890, 28457780]

約数ペア:

[(1, 28457780), (2, 14228890), (4, 7114445), (5, 5691556), (10, 2845778), (13, 2189060), (20, 1422889), (26, 1094530), (52, 547265), (65, 437812), (130, 218906), (260, 109453)]