21148518

素因数分解:

$2^1\times 3^1\times {\mathrm{43}}^1\times {\mathrm{81971}}^1$

素因数の和:82019

約数の個数: 16

約数和(自身を含む): 43281216

約数和(自身を除く): 22132698

約数列:

[1, 2, 3, 6, 43, 86, 129, 258, 81971, 163942, 245913, 491826, 3524753, 7049506, 10574259, 21148518]

約数ペア:

[(1, 21148518), (2, 10574259), (3, 7049506), (6, 3524753), (43, 491826), (86, 245913), (129, 163942), (258, 81971)]