20405564

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{43}}^2\times {\mathrm{89}}^1$

素因数の和:210

約数の個数: 36

約数和(自身を含む): 38162880

約数和(自身を除く): 17757316

約数列:

[1, 2, 4, 31, 43, 62, 86, 89, 124, 172, 178, 356, 1333, 1849, 2666, 2759, 3698, 3827, 5332, 5518, 7396, 7654, 11036, 15308, 57319, 114638, 118637, 164561, 229276, 237274, 329122, 474548, 658244, 5101391, 10202782, 20405564]

約数ペア:

[(1, 20405564), (2, 10202782), (4, 5101391), (31, 658244), (43, 474548), (62, 329122), (86, 237274), (89, 229276), (124, 164561), (172, 118637), (178, 114638), (356, 57319), (1333, 15308), (1849, 11036), (2666, 7654), (2759, 7396), (3698, 5518), (3827, 5332)]