20399121

素因数分解:

$3^5\times {\mathrm{127}}^1\times {\mathrm{661}}^1$

素因数の和:803

約数の個数: 24

約数和(自身を含む): 30843904

約数和(自身を除く): 10444783

約数列:

[1, 3, 9, 27, 81, 127, 243, 381, 661, 1143, 1983, 3429, 5949, 10287, 17847, 30861, 53541, 83947, 160623, 251841, 755523, 2266569, 6799707, 20399121]

約数ペア:

[(1, 20399121), (3, 6799707), (9, 2266569), (27, 755523), (81, 251841), (127, 160623), (243, 83947), (381, 53541), (661, 30861), (1143, 17847), (1983, 10287), (3429, 5949)]