21553660

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9887}}^1$

素因数の和:10005

約数の個数: 24

約数和(自身を含む): 45682560

約数和(自身を除く): 24128900

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9887, 19774, 39548, 49435, 98870, 197740, 1077683, 2155366, 4310732, 5388415, 10776830, 21553660]

約数ペア:

[(1, 21553660), (2, 10776830), (4, 5388415), (5, 4310732), (10, 2155366), (20, 1077683), (109, 197740), (218, 98870), (436, 49435), (545, 39548), (1090, 19774), (2180, 9887)]