20291439

素因数分解:

$3^1\times 7^2\times {\mathrm{223}}^1\times {\mathrm{619}}^1$

素因数の和:859

約数の個数: 24

約数和(自身を含む): 31664640

約数和(自身を除く): 11373201

約数列:

[1, 3, 7, 21, 49, 147, 223, 619, 669, 1561, 1857, 4333, 4683, 10927, 12999, 30331, 32781, 90993, 138037, 414111, 966259, 2898777, 6763813, 20291439]

約数ペア:

[(1, 20291439), (3, 6763813), (7, 2898777), (21, 966259), (49, 414111), (147, 138037), (223, 90993), (619, 32781), (669, 30331), (1561, 12999), (1857, 10927), (4333, 4683)]