21278718

素因数分解:

$2^1\times 3^2\times {\mathrm{839}}^1\times {\mathrm{1409}}^1$

素因数の和:2256

約数の個数: 24

約数和(自身を含む): 46191600

約数和(自身を除く): 24912882

約数列:

[1, 2, 3, 6, 9, 18, 839, 1409, 1678, 2517, 2818, 4227, 5034, 7551, 8454, 12681, 15102, 25362, 1182151, 2364302, 3546453, 7092906, 10639359, 21278718]

約数ペア:

[(1, 21278718), (2, 10639359), (3, 7092906), (6, 3546453), (9, 2364302), (18, 1182151), (839, 25362), (1409, 15102), (1678, 12681), (2517, 8454), (2818, 7551), (4227, 5034)]