20988681

素因数分解:

$3^1\times 7^1\times {\mathrm{503}}^1\times {\mathrm{1987}}^1$

素因数の和:2500

約数の個数: 16

約数和(自身を含む): 32062464

約数和(自身を除く): 11073783

約数列:

[1, 3, 7, 21, 503, 1509, 1987, 3521, 5961, 10563, 13909, 41727, 999461, 2998383, 6996227, 20988681]

約数ペア:

[(1, 20988681), (3, 6996227), (7, 2998383), (21, 999461), (503, 41727), (1509, 13909), (1987, 10563), (3521, 5961)]