171920721

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{430879}}^1$

素因数の和:430908

約数の個数: 16

約数和(自身を含む): 275763200

約数和(自身を除く): 103842479

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 430879, 1292637, 3016153, 8186701, 9048459, 24560103, 57306907, 171920721]

約数ペア:

[(1, 171920721), (3, 57306907), (7, 24560103), (19, 9048459), (21, 8186701), (57, 3016153), (133, 1292637), (399, 430879)]