21516556

素因数分解:

$2^2\times {\mathrm{113}}^1\times {\mathrm{181}}^1\times {\mathrm{263}}^1$

素因数の和:561

約数の個数: 24

約数和(自身を含む): 38342304

約数和(自身を除く): 16825748

約数列:

[1, 2, 4, 113, 181, 226, 263, 362, 452, 526, 724, 1052, 20453, 29719, 40906, 47603, 59438, 81812, 95206, 118876, 190412, 5379139, 10758278, 21516556]

約数ペア:

[(1, 21516556), (2, 10758278), (4, 5379139), (113, 190412), (181, 118876), (226, 95206), (263, 81812), (362, 59438), (452, 47603), (526, 40906), (724, 29719), (1052, 20453)]