21979257

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{5431}}^1$

素因数の和:5524

約数の個数: 16

約数和(自身を含む): 31288320

約数和(自身を除く): 9309063

約数列:

[1, 3, 19, 57, 71, 213, 1349, 4047, 5431, 16293, 103189, 309567, 385601, 1156803, 7326419, 21979257]

約数ペア:

[(1, 21979257), (3, 7326419), (19, 1156803), (57, 385601), (71, 309567), (213, 103189), (1349, 16293), (4047, 5431)]