20979399

素因数分解:

$3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{3319}}^1$

素因数の和:3379

約数の個数: 24

約数和(自身を含む): 33306240

約数和(自身を除く): 12326841

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 903, 2107, 3319, 6321, 9957, 23233, 69699, 142717, 162631, 428151, 487893, 999019, 2997057, 6993133, 20979399]

約数ペア:

[(1, 20979399), (3, 6993133), (7, 2997057), (21, 999019), (43, 487893), (49, 428151), (129, 162631), (147, 142717), (301, 69699), (903, 23233), (2107, 9957), (3319, 6321)]