20684811

素因数分解:

$3^1\times 7^2\times {\mathrm{223}}^1\times {\mathrm{631}}^1$

素因数の和:871

約数の個数: 24

約数和(自身を含む): 32277504

約数和(自身を除く): 11592693

約数列:

[1, 3, 7, 21, 49, 147, 223, 631, 669, 1561, 1893, 4417, 4683, 10927, 13251, 30919, 32781, 92757, 140713, 422139, 984991, 2954973, 6894937, 20684811]

約数ペア:

[(1, 20684811), (3, 6894937), (7, 2954973), (21, 984991), (49, 422139), (147, 140713), (223, 92757), (631, 32781), (669, 30919), (1561, 13251), (1893, 10927), (4417, 4683)]