21150409

素因数分解:

$7^4\times {\mathrm{23}}^1\times {\mathrm{383}}^1$

素因数の和:434

約数の個数: 20

約数和(自身を含む): 25814016

約数和(自身を除く): 4663607

約数列:

[1, 7, 23, 49, 161, 343, 383, 1127, 2401, 2681, 7889, 8809, 18767, 55223, 61663, 131369, 431641, 919583, 3021487, 21150409]

約数ペア:

[(1, 21150409), (7, 3021487), (23, 919583), (49, 431641), (161, 131369), (343, 61663), (383, 55223), (1127, 18767), (2401, 8809), (2681, 7889)]