20405084

素因数分解:

$2^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{5563}}^1$

素因数の和:5705

約数の個数: 24

約数和(自身を含む): 41129088

約数和(自身を除く): 20724004

約数列:

[1, 2, 4, 7, 14, 28, 131, 262, 524, 917, 1834, 3668, 5563, 11126, 22252, 38941, 77882, 155764, 728753, 1457506, 2915012, 5101271, 10202542, 20405084]

約数ペア:

[(1, 20405084), (2, 10202542), (4, 5101271), (7, 2915012), (14, 1457506), (28, 728753), (131, 155764), (262, 77882), (524, 38941), (917, 22252), (1834, 11126), (3668, 5563)]