20215881

素因数分解:

$3^2\times 7^2\times {\mathrm{45841}}^1$

素因数の和:45861

約数の個数: 18

約数和(自身を含む): 33968922

約数和(自身を除く): 13753041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45841, 137523, 320887, 412569, 962661, 2246209, 2887983, 6738627, 20215881]

約数ペア:

[(1, 20215881), (3, 6738627), (7, 2887983), (9, 2246209), (21, 962661), (49, 412569), (63, 320887), (147, 137523), (441, 45841)]