19877997

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1\times {\mathrm{691}}^1$

素因数の和:960

約数の個数: 16

約数和(自身を含む): 27281408

約数和(自身を除く): 7403411

約数列:

[1, 3, 43, 129, 223, 669, 691, 2073, 9589, 28767, 29713, 89139, 154093, 462279, 6625999, 19877997]

約数ペア:

[(1, 19877997), (3, 6625999), (43, 462279), (129, 154093), (223, 89139), (669, 29713), (691, 28767), (2073, 9589)]