21156575

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{719}}^1$

素因数の和:847

約数の個数: 24

約数和(自身を含む): 28926720

約数和(自身を除く): 7770145

約数列:

[1, 5, 11, 25, 55, 107, 275, 535, 719, 1177, 2675, 3595, 5885, 7909, 17975, 29425, 39545, 76933, 197725, 384665, 846263, 1923325, 4231315, 21156575]

約数ペア:

[(1, 21156575), (5, 4231315), (11, 1923325), (25, 846263), (55, 384665), (107, 197725), (275, 76933), (535, 39545), (719, 29425), (1177, 17975), (2675, 7909), (3595, 5885)]