21684560

素因数分解:

$2^4\times 5^1\times {\mathrm{271057}}^1$

素因数の和:271070

約数の個数: 20

約数和(自身を含む): 50416788

約数和(自身を除く): 28732228

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 271057, 542114, 1084228, 1355285, 2168456, 2710570, 4336912, 5421140, 10842280, 21684560]

約数ペア:

[(1, 21684560), (2, 10842280), (4, 5421140), (5, 4336912), (8, 2710570), (10, 2168456), (16, 1355285), (20, 1084228), (40, 542114), (80, 271057)]