20865691

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{2683}}^1$

素因数の和:2802

約数の個数: 16

約数和(自身を含む): 26281728

約数和(自身を除く): 5416037

約数列:

[1, 7, 11, 77, 101, 707, 1111, 2683, 7777, 18781, 29513, 206591, 270983, 1896881, 2980813, 20865691]

約数ペア:

[(1, 20865691), (7, 2980813), (11, 1896881), (77, 270983), (101, 206591), (707, 29513), (1111, 18781), (2683, 7777)]