21126889

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{271}}^1$

素因数の和:365

約数の個数: 24

約数和(自身を含む): 25922688

約数和(自身を除く): 4795799

約数列:

[1, 7, 37, 43, 49, 259, 271, 301, 1591, 1813, 1897, 2107, 10027, 11137, 11653, 13279, 70189, 77959, 81571, 431161, 491323, 570997, 3018127, 21126889]

約数ペア:

[(1, 21126889), (7, 3018127), (37, 570997), (43, 491323), (49, 431161), (259, 81571), (271, 77959), (301, 70189), (1591, 13279), (1813, 11653), (1897, 11137), (2107, 10027)]