20542075

素因数分解:

$5^2\times {\mathrm{71}}^2\times {\mathrm{163}}^1$

素因数の和:315

約数の個数: 18

約数和(自身を含む): 25994492

約数和(自身を除く): 5452417

約数列:

[1, 5, 25, 71, 163, 355, 815, 1775, 4075, 5041, 11573, 25205, 57865, 126025, 289325, 821683, 4108415, 20542075]

約数ペア:

[(1, 20542075), (5, 4108415), (25, 821683), (71, 289325), (163, 126025), (355, 57865), (815, 25205), (1775, 11573), (4075, 5041)]