256987017

素因数分解:

$3^2\times 7^2\times {\mathrm{582737}}^1$

素因数の和:582757

約数の個数: 18

約数和(自身を含む): 431808858

約数和(自身を除く): 174821841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 582737, 1748211, 4079159, 5244633, 12237477, 28554113, 36712431, 85662339, 256987017]

約数ペア:

[(1, 256987017), (3, 85662339), (7, 36712431), (9, 28554113), (21, 12237477), (49, 5244633), (63, 4079159), (147, 1748211), (441, 582737)]