21400225

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{11117}}^1$

素因数の和:11145

約数の個数: 24

約数和(自身を含む): 33087168

約数和(自身を除く): 11686943

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 175, 275, 385, 1925, 11117, 55585, 77819, 122287, 277925, 389095, 611435, 856009, 1945475, 3057175, 4280045, 21400225]

約数ペア:

[(1, 21400225), (5, 4280045), (7, 3057175), (11, 1945475), (25, 856009), (35, 611435), (55, 389095), (77, 277925), (175, 122287), (275, 77819), (385, 55585), (1925, 11117)]