21395825

素因数分解:

$5^2\times {\mathrm{11}}^3\times {\mathrm{643}}^1$

素因数の和:686

約数の個数: 24

約数和(自身を含む): 29227296

約数和(自身を除く): 7831471

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 643, 1331, 3025, 3215, 6655, 7073, 16075, 33275, 35365, 77803, 176825, 389015, 855833, 1945075, 4279165, 21395825]

約数ペア:

[(1, 21395825), (5, 4279165), (11, 1945075), (25, 855833), (55, 389015), (121, 176825), (275, 77803), (605, 35365), (643, 33275), (1331, 16075), (3025, 7073), (3215, 6655)]