21464009

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1$

素因数の和:285

約数の個数: 24

約数和(自身を含む): 26123328

約数和(自身を除く): 4659319

約数列:

[1, 7, 43, 49, 61, 167, 301, 427, 1169, 2107, 2623, 2989, 7181, 8183, 10187, 18361, 50267, 71309, 128527, 351869, 438041, 499163, 3066287, 21464009]

約数ペア:

[(1, 21464009), (7, 3066287), (43, 499163), (49, 438041), (61, 351869), (167, 128527), (301, 71309), (427, 50267), (1169, 18361), (2107, 10187), (2623, 8183), (2989, 7181)]