21435940

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9833}}^1$

素因数の和:9951

約数の個数: 24

約数和(自身を含む): 45433080

約数和(自身を除く): 23997140

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9833, 19666, 39332, 49165, 98330, 196660, 1071797, 2143594, 4287188, 5358985, 10717970, 21435940]

約数ペア:

[(1, 21435940), (2, 10717970), (4, 5358985), (5, 4287188), (10, 2143594), (20, 1071797), (109, 196660), (218, 98330), (436, 49165), (545, 39332), (1090, 19666), (2180, 9833)]