256403721

素因数分解:

$3^1\times 7^2\times {\mathrm{1744243}}^1$

素因数の和:1744260

約数の個数: 12

約数和(自身を含む): 397687632

約数和(自身を除く): 141283911

約数列:

[1, 3, 7, 21, 49, 147, 1744243, 5232729, 12209701, 36629103, 85467907, 256403721]

約数ペア:

[(1, 256403721), (3, 85467907), (7, 36629103), (21, 12209701), (49, 5232729), (147, 1744243)]