20975948

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{12281}}^1$

素因数の和:12353

約数の個数: 24

約数和(自身を含む): 42643104

約数和(自身を除く): 21667156

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 12281, 24562, 49124, 85967, 171934, 343868, 749141, 1498282, 2996564, 5243987, 10487974, 20975948]

約数ペア:

[(1, 20975948), (2, 10487974), (4, 5243987), (7, 2996564), (14, 1498282), (28, 749141), (61, 343868), (122, 171934), (244, 85967), (427, 49124), (854, 24562), (1708, 12281)]