40807557

素因数分解:

$3^4\times 7^1\times {\mathrm{71971}}^1$

素因数の和:71990

約数の個数: 20

約数和(自身を含む): 69668896

約数和(自身を除く): 28861339

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 71971, 215913, 503797, 647739, 1511391, 1943217, 4534173, 5829651, 13602519, 40807557]

約数ペア:

[(1, 40807557), (3, 13602519), (7, 5829651), (9, 4534173), (21, 1943217), (27, 1511391), (63, 647739), (81, 503797), (189, 215913), (567, 71971)]