20513979

素因数分解:

$3^4\times {\mathrm{251}}^1\times {\mathrm{1009}}^1$

素因数の和:1272

約数の個数: 20

約数和(自身を含む): 30796920

約数和(自身を除く): 10282941

約数列:

[1, 3, 9, 27, 81, 251, 753, 1009, 2259, 3027, 6777, 9081, 20331, 27243, 81729, 253259, 759777, 2279331, 6837993, 20513979]

約数ペア:

[(1, 20513979), (3, 6837993), (9, 2279331), (27, 759777), (81, 253259), (251, 81729), (753, 27243), (1009, 20331), (2259, 9081), (3027, 6777)]