21979181

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{9721}}^1$

素因数の和:9764

約数の個数: 16

約数和(自身を含む): 27999360

約数和(自身を除く): 6020179

約数列:

[1, 7, 17, 19, 119, 133, 323, 2261, 9721, 68047, 165257, 184699, 1156799, 1292893, 3139883, 21979181]

約数ペア:

[(1, 21979181), (7, 3139883), (17, 1292893), (19, 1156799), (119, 184699), (133, 165257), (323, 68047), (2261, 9721)]