19805401

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{67}}^1\times {\mathrm{349}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 25323200

約数和(自身を除く): 5517799

約数列:

[1, 7, 11, 67, 77, 121, 349, 469, 737, 847, 2443, 3839, 5159, 8107, 23383, 26873, 42229, 56749, 163681, 257213, 295603, 1800491, 2829343, 19805401]

約数ペア:

[(1, 19805401), (7, 2829343), (11, 1800491), (67, 295603), (77, 257213), (121, 163681), (349, 56749), (469, 42229), (737, 26873), (847, 23383), (2443, 8107), (3839, 5159)]