90805040

素因数分解:

$2^4\times 5^1\times {\mathrm{1135063}}^1$

素因数の和:1135076

約数の個数: 20

約数和(自身を含む): 211121904

約数和(自身を除く): 120316864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1135063, 2270126, 4540252, 5675315, 9080504, 11350630, 18161008, 22701260, 45402520, 90805040]

約数ペア:

[(1, 90805040), (2, 45402520), (4, 22701260), (5, 18161008), (8, 11350630), (10, 9080504), (16, 5675315), (20, 4540252), (40, 2270126), (80, 1135063)]