21074337

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{4909}}^1$

素因数の和:4974

約数の個数: 20

約数和(自身を含む): 32081940

約数和(自身を除く): 11007603

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 4909, 14727, 44181, 132543, 260177, 397629, 780531, 2341593, 7024779, 21074337]

約数ペア:

[(1, 21074337), (3, 7024779), (9, 2341593), (27, 780531), (53, 397629), (81, 260177), (159, 132543), (477, 44181), (1431, 14727), (4293, 4909)]