208821879

素因数分解:

$3^2\times 7^2\times {\mathrm{473519}}^1$

素因数の和:473539

約数の個数: 18

約数和(自身を含む): 350878320

約数和(自身を除く): 142056441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 473519, 1420557, 3314633, 4261671, 9943899, 23202431, 29831697, 69607293, 208821879]

約数ペア:

[(1, 208821879), (3, 69607293), (7, 29831697), (9, 23202431), (21, 9943899), (49, 4261671), (63, 3314633), (147, 1420557), (441, 473519)]