208994751

素因数分解:

$3^2\times 7^2\times {\mathrm{473911}}^1$

素因数の和:473931

約数の個数: 18

約数和(自身を含む): 351168792

約数和(自身を除く): 142174041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 473911, 1421733, 3317377, 4265199, 9952131, 23221639, 29856393, 69664917, 208994751]

約数ペア:

[(1, 208994751), (3, 69664917), (7, 29856393), (9, 23221639), (21, 9952131), (49, 4265199), (63, 3317377), (147, 1421733), (441, 473911)]