21256459

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{883}}^1$

素因数の和:1090

約数の個数: 16

約数和(自身を含む): 25742080

約数和(自身を除く): 4485621

約数列:

[1, 7, 19, 133, 181, 883, 1267, 3439, 6181, 16777, 24073, 117439, 159823, 1118761, 3036637, 21256459]

約数ペア:

[(1, 21256459), (7, 3036637), (19, 1118761), (133, 159823), (181, 117439), (883, 24073), (1267, 16777), (3439, 6181)]