21256228

素因数分解:

$2^2\times 7^1\times {\mathrm{311}}^1\times {\mathrm{2441}}^1$

素因数の和:2763

約数の個数: 24

約数和(自身を含む): 42666624

約数和(自身を除く): 21410396

約数列:

[1, 2, 4, 7, 14, 28, 311, 622, 1244, 2177, 2441, 4354, 4882, 8708, 9764, 17087, 34174, 68348, 759151, 1518302, 3036604, 5314057, 10628114, 21256228]

約数ペア:

[(1, 21256228), (2, 10628114), (4, 5314057), (7, 3036604), (14, 1518302), (28, 759151), (311, 68348), (622, 34174), (1244, 17087), (2177, 9764), (2441, 8708), (4354, 4882)]