20501991

素因数分解:

$3^4\times {\mathrm{127}}^1\times {\mathrm{1993}}^1$

素因数の和:2132

約数の個数: 20

約数和(自身を含む): 30883072

約数和(自身を除く): 10381081

約数列:

[1, 3, 9, 27, 81, 127, 381, 1143, 1993, 3429, 5979, 10287, 17937, 53811, 161433, 253111, 759333, 2277999, 6833997, 20501991]

約数ペア:

[(1, 20501991), (3, 6833997), (9, 2277999), (27, 759333), (81, 253111), (127, 161433), (381, 53811), (1143, 17937), (1993, 10287), (3429, 5979)]