21139998725

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{1049}}^1\times {\mathrm{19661}}^1$

素因数の和:20761

約数の個数: 24

約数和(自身を含む): 26879920200

約数和(自身を除く): 5739921475

約数列:

[1, 5, 25, 41, 205, 1025, 1049, 5245, 19661, 26225, 43009, 98305, 215045, 491525, 806101, 1075225, 4030505, 20152525, 20624389, 103121945, 515609725, 845599949, 4227999745, 21139998725]

約数ペア:

[(1, 21139998725), (5, 4227999745), (25, 845599949), (41, 515609725), (205, 103121945), (1025, 20624389), (1049, 20152525), (5245, 4030505), (19661, 1075225), (26225, 806101), (43009, 491525), (98305, 215045)]