21723289

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{233}}^1\times {\mathrm{701}}^1$

素因数の和:960

約数の個数: 16

約数和(自身を含む): 26282880

約数和(自身を除く): 4559591

約数列:

[1, 7, 19, 133, 233, 701, 1631, 4427, 4907, 13319, 30989, 93233, 163333, 1143331, 3103327, 21723289]

約数ペア:

[(1, 21723289), (7, 3103327), (19, 1143331), (133, 163333), (233, 93233), (701, 30989), (1631, 13319), (4427, 4907)]