199816981

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{2521}}^1$

素因数の和:2621

約数の個数: 24

約数和(自身を含む): 251070144

約数和(自身を除く): 51253163

約数列:

[1, 7, 13, 67, 91, 169, 469, 871, 1183, 2521, 6097, 11323, 17647, 32773, 79261, 168907, 229411, 426049, 1182349, 2195791, 2982343, 15370537, 28545283, 199816981]

約数ペア:

[(1, 199816981), (7, 28545283), (13, 15370537), (67, 2982343), (91, 2195791), (169, 1182349), (469, 426049), (871, 229411), (1183, 168907), (2521, 79261), (6097, 32773), (11323, 17647)]