20821040

素因数分解:

$2^4\times 5^1\times {\mathrm{260263}}^1$

素因数の和:260276

約数の個数: 20

約数和(自身を含む): 48409104

約数和(自身を除く): 27588064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 260263, 520526, 1041052, 1301315, 2082104, 2602630, 4164208, 5205260, 10410520, 20821040]

約数ペア:

[(1, 20821040), (2, 10410520), (4, 5205260), (5, 4164208), (8, 2602630), (10, 2082104), (16, 1301315), (20, 1041052), (40, 520526), (80, 260263)]