21294427

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{811}}^1$

素因数の和:871

約数の個数: 24

約数和(自身を含む): 27646976

約数和(自身を除く): 6352549

約数列:

[1, 7, 11, 31, 77, 121, 217, 341, 811, 847, 2387, 3751, 5677, 8921, 25141, 26257, 62447, 98131, 175987, 276551, 686917, 1935857, 3042061, 21294427]

約数ペア:

[(1, 21294427), (7, 3042061), (11, 1935857), (31, 686917), (77, 276551), (121, 175987), (217, 98131), (341, 62447), (811, 26257), (847, 25141), (2387, 8921), (3751, 5677)]