81513215

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19571}}^1$

素因数の和:19607

約数の個数: 24

約数和(自身を含む): 120485232

約数和(自身を除く): 38972017

約数列:

[1, 5, 7, 17, 35, 49, 85, 119, 245, 595, 833, 4165, 19571, 97855, 136997, 332707, 684985, 958979, 1663535, 2328949, 4794895, 11644745, 16302643, 81513215]

約数ペア:

[(1, 81513215), (5, 16302643), (7, 11644745), (17, 4794895), (35, 2328949), (49, 1663535), (85, 958979), (119, 684985), (245, 332707), (595, 136997), (833, 97855), (4165, 19571)]