21176810

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{5281}}^1$

素因数の和:5689

約数の個数: 16

約数和(自身を含む): 38220552

約数和(自身を除く): 17043742

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 5281, 10562, 26405, 52810, 2117681, 4235362, 10588405, 21176810]

約数ペア:

[(1, 21176810), (2, 10588405), (5, 4235362), (10, 2117681), (401, 52810), (802, 26405), (2005, 10562), (4010, 5281)]