21201140

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5381}}^1$

素因数の和:5587

約数の個数: 24

約数和(自身を含む): 44756712

約数和(自身を除く): 23555572

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 5381, 10762, 21524, 26905, 53810, 107620, 1060057, 2120114, 4240228, 5300285, 10600570, 21201140]

約数ペア:

[(1, 21201140), (2, 10600570), (4, 5300285), (5, 4240228), (10, 2120114), (20, 1060057), (197, 107620), (394, 53810), (788, 26905), (985, 21524), (1970, 10762), (3940, 5381)]