21163828

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{12391}}^1$

素因数の和:12463

約数の個数: 24

約数和(自身を含む): 43025024

約数和(自身を除く): 21861196

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 12391, 24782, 49564, 86737, 173474, 346948, 755851, 1511702, 3023404, 5290957, 10581914, 21163828]

約数ペア:

[(1, 21163828), (2, 10581914), (4, 5290957), (7, 3023404), (14, 1511702), (28, 755851), (61, 346948), (122, 173474), (244, 86737), (427, 49564), (854, 24782), (1708, 12391)]