21281359

素因数分解:

${\mathrm{11}}^3\times {\mathrm{59}}^1\times {\mathrm{271}}^1$

素因数の和:363

約数の個数: 16

約数和(自身を含む): 23892480

約数和(自身を除く): 2611121

約数列:

[1, 11, 59, 121, 271, 649, 1331, 2981, 7139, 15989, 32791, 78529, 175879, 360701, 1934669, 21281359]

約数ペア:

[(1, 21281359), (11, 1934669), (59, 360701), (121, 175879), (271, 78529), (649, 32791), (1331, 15989), (2981, 7139)]