21109878

素因数分解:

$2^1\times 3^2\times {\mathrm{521}}^1\times {\mathrm{2251}}^1$

素因数の和:2780

約数の個数: 24

約数和(自身を含む): 45846216

約数和(自身を除く): 24736338

約数列:

[1, 2, 3, 6, 9, 18, 521, 1042, 1563, 2251, 3126, 4502, 4689, 6753, 9378, 13506, 20259, 40518, 1172771, 2345542, 3518313, 7036626, 10554939, 21109878]

約数ペア:

[(1, 21109878), (2, 10554939), (3, 7036626), (6, 3518313), (9, 2345542), (18, 1172771), (521, 40518), (1042, 20259), (1563, 13506), (2251, 9378), (3126, 6753), (4502, 4689)]