21157458025

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{6994201}}^1$

素因数の和:6994233

約数の個数: 18

約数和(自身を含む): 28837094846

約数和(自身を除く): 7679636821

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 3025, 6994201, 34971005, 76936211, 174855025, 384681055, 846298321, 1923405275, 4231491605, 21157458025]

約数ペア:

[(1, 21157458025), (5, 4231491605), (11, 1923405275), (25, 846298321), (55, 384681055), (121, 174855025), (275, 76936211), (605, 34971005), (3025, 6994201)]