21611989

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{227}}^1$

素因数の和:337

約数の個数: 24

約数和(自身を含む): 26511840

約数和(自身を除く): 4899851

約数列:

[1, 7, 29, 49, 67, 203, 227, 469, 1421, 1589, 1943, 3283, 6583, 11123, 13601, 15209, 46081, 95207, 106463, 322567, 441061, 745241, 3087427, 21611989]

約数ペア:

[(1, 21611989), (7, 3087427), (29, 745241), (49, 441061), (67, 322567), (203, 106463), (227, 95207), (469, 46081), (1421, 15209), (1589, 13601), (1943, 11123), (3283, 6583)]