21358865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{271}}^1\times {\mathrm{1433}}^1$

素因数の和:1720

約数の個数: 16

約数和(自身を含む): 28083456

約数和(自身を除く): 6724591

約数列:

[1, 5, 11, 55, 271, 1355, 1433, 2981, 7165, 14905, 15763, 78815, 388343, 1941715, 4271773, 21358865]

約数ペア:

[(1, 21358865), (5, 4271773), (11, 1941715), (55, 388343), (271, 78815), (1355, 15763), (1433, 14905), (2981, 7165)]