20909903

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{167}}^1\times {\mathrm{577}}^1$

素因数の和:782

約数の個数: 16

約数和(自身を含む): 24858624

約数和(自身を除く): 3948721

約数列:

[1, 7, 31, 167, 217, 577, 1169, 4039, 5177, 17887, 36239, 96359, 125209, 674513, 2987129, 20909903]

約数ペア:

[(1, 20909903), (7, 2987129), (31, 674513), (167, 125209), (217, 96359), (577, 36239), (1169, 17887), (4039, 5177)]