20871380

素因数分解:

$2^2\times 5^1\times {\mathrm{941}}^1\times {\mathrm{1109}}^1$

素因数の和:2059

約数の個数: 24

約数和(自身を含む): 43916040

約数和(自身を除く): 23044660

約数列:

[1, 2, 4, 5, 10, 20, 941, 1109, 1882, 2218, 3764, 4436, 4705, 5545, 9410, 11090, 18820, 22180, 1043569, 2087138, 4174276, 5217845, 10435690, 20871380]

約数ペア:

[(1, 20871380), (2, 10435690), (4, 5217845), (5, 4174276), (10, 2087138), (20, 1043569), (941, 22180), (1109, 18820), (1882, 11090), (2218, 9410), (3764, 5545), (4436, 4705)]